1. Aljoundi, E. (2013). The strengths and weaknesses of code switching and bilingualism in the language classroom. https://doi.org/10.13140/RG.2.1.5051.1762
2. Ansar, F. A. (2017). Code switching and code mixing in teaching-learning process. English Education: Jurnal Tadris Bahasa Inggris, 10(1), 29-45.
3. Astutik, Y. (2014). Code Mixing Debat Capres Cawapres 2014. Retrieved from http://www.academia.edu/9212130/Code_Mixing_Debat_Capres_Cawapres 2014
4. Azis, H. N., & Rahmawati, L. E. (2021). Alih Kode dan Campur Kode dalam Pembelajaran Bahasa Indonesia. ESTETIK: Jurnal Bahasa Indonesia, 4(1), 55-64.
5. Blair, M., & Morini, G. (2022). From one language to the other: Examining the role of code-switching on vocabulary learning in adult second-language learners. Second Language Research, 02676583221113334.
6. Blaxter, M. (1996). Criteria For The Evaluation Of Qualitative Research Papers. Medical Sociology News, 22(1), 4–7.
7. Chairuddin, C., & Aditya, M. Y. (2021). The implication of bilingualism in EFL classroom: An investigation of teaching and learning in English department. Journal of Research on English and Language Learning (J-REaLL), 2(1), 184.
8. Creswell, J. W. (2014). A concise introduction to mixed methods research. SAGE publications.
9. Dema, D. (2022). Learners’ Preference: A Reason to Use Code-Switching in Teaching and Learning Short Stories in Grade X English. Educational Innovation and Practice, 5, 36-60.
10. Dewi, T. (2021). Language use: Code mixing, code switching, borrowing, pidginization, and creolization. Yavana Bhasha: Journal of English Language Education, 4(1), 34-44. https://doi.org/10.25078/yb.v4i1.654
11. Fadilah, I. N., & Astutik, Y. (2019). An analysis of code mixing and code switching used by teacher and students in english class. International Journal on Integrated Education, 3(1), 118-122.
12. Fahira, Y. A. (2022). An Analysis Of Code Mixing In Nessie Judge's Tweets (Doctoral dissertation, Universitas Islam Riau).
13. Gardner-Chloros, P. (2009). Code-switching. Cambridge university press.
14. Girsang, S. E., & Saragih, N. I. (2021). The Code-Mixing And Code-Switching In Teaching English At Seventh Grade Of Smp N 1 Raya. Bilingual: Jurnal Pendidikan Bahasa Inggris, 3(2), 103-110.Hoffman, C. (1991). An introduction to bilingualism. New York: Longman.
15. Hu, Y., Afzaal, M., & Alfadda, H. (2022). The perceptions of international learners toward teacher code-switching in the elementary and intermediate Chinese foreign language classrooms. Frontiers in Psychology, 13, 860567.
16. Hudson, R. A. (1980). Sociolunguistics. Cambridge: Cambridge University Press.
17. Khan, A. A., Khalid, A., & Saleem, T. (2023). The evidence of Embedded Language islands: the case of Pashto-English codeswitching. International Journal of Multilingualism,1- 24.
18. Kumar, T., Nukapangu, V., & Hassan, A. (2021). Effectiveness of code-switching in language classroom in India at primary level: a case of L2 teachers’ perspectives. Pegem Journal of Education and Instruction, 11(4), 379-385.
19. Lincoln, Y. S., & Guba, E. G. (1985). Naturalistic inquiry. Sage.
20. Masna, Y. (2020). EFL learners’ code-switching: Why do they switch the language?. Englisia: Journal of Language, Education, and Humanities, 8(1), 93-101.
21. Maishara, N., Dieba, F., Ali, R., Intan, S., & Syed, S. (2013). ESL Learners ’ r eactions towards code switching in classroom settings. Procedia - Social and Behavioral Sciences, 90 (Incult 2012), 478–487.https://doi.org/10.1016/j.sbspro.2013.07.117
22. Mauliddiyah, A., Munir, A., & Mustofa, A. (2020). The use of code-switching in the EFL classroom of first-grade at junior high school. International Journal for Educational and Vocational Studies, 2(1), 143-148.
23. Maya, P. S. (2022). An Analysis Of Code Switching And Code Mixing Used In Teaching And Learning English At The Tenth Grade Students Of Smkn 1 Rota Bayat In The Academic Year Of 2021/2022(Doctoral dissertation, Universitas Widya Dharma).
24. Miles, M. B., Huberman, A. M., & Saldana, J. (2014). Qualitative Data Analysis (3 ed). In United State of America: SAGE Publication (Third Edit).
25. Moradi, H., & Chen, J. (2022). Attitude-Behavior Relation and Language Use: Chinese-English Code-Switching and Code-Mixing Among Chinese Undergraduate Students. SAGE Open, 12(4), 21582440221142287.
26. Murtiningsih, S. R., Munawaroh, M., & Hidayatulloh, S. M. M. (2022). Code-switching in EFL classrooms: factors influencing teachers to use code-switching and its types used in the classrooms. Journal on English as a Foreign Language, 12(2), 318-338.
27. Muysken, P. (2000). Bilingual speech: A typology of code mixing. Cambridge; Cambridge University Press.
28. Novianti, R., & Said, M. (2021). The use of code-switching and code-mixing in english teaching-learning process. Deiksis, 13(1), 82-92.
29. Putri, M. B. (2021). An Analysis Of Code-Mixing Found In Cinta Laura Kiehl’s Video Youtube Channel (Doctoral dissertation, UIN Raden Intan Lampung).
30. Riadil, I. G. (2021). Investigating EFL learners’“Indonglish” usage by English department students: A qualitative study. International Journal of Humanity Studies (IJHS), 5(1), 47- 56. https://doi.org/10.24071/ijhs.v5i1.1943
31. Riadil, I. G., & Dilts, N. (2022). Envisaging Code-Mixing And Code-Switching In English Conversation Among Thai Students: Breaching The Motives From Sociolinguistic Perspectives. International Journal of Humanity Studies (IJHS), 6(1), 139-154.
32. Richards, J. C., & Rodgers, T. S. (2014). Approaches and methods in language teaching. Cambridge university press.
33. Rifiyanti, H. (2020). Learners’ perceptions of online English learning during COVID-19 pandemic. Scope: Journal of english language teaching, 5(1), 31-35.
34. Samsi, Y. S. (2016). Code-switching and Code-Mixing in Tourism Industry Toward Multilingual. Script Journal, 1(2).
35. Sato, M. (2023). Skill Learning Theories And Language Teaching. Practice and Automatization in Second Language Research: Perspectives from Skill Acquisition Theory and Cognitive Psychology.
36. Sharma, G. (2017). Pros and cons of different sampling techniques. International journal of applied research, 3(7), 749-752.
37. Simasiku, L., Kasanda, C., & Smit, T. (2015). Can Code Switching Enhance Learners' Academic Achievement?. English Language Teaching, 8(2), 70-77.
38. Simatupang, R. R., Rohmadi, M., & Saddhono, K. (2018). Alih kode dan campur kode tuturan di lingkungan pendidikan. Lingtera, 5(1), 1-9.
39. Singh, S. K., & Sachan, M. (2017). Importance and challenges of social media text. International Journal of Advanced Computer Research, 8(3), 831-834. https://doi.org/10.26483/ijarcs.v8i3.3108
40. Siregar, I., & Sosrohadi, S. (2021). Analysis of code mixing in jerome polin youtube content “nihongo mantappu”. International Journal of Linguistics, Literature and Translation, 4(12), 01-08.
41. Subon, F., & Tarmim, S. S. M. (2021). The Code-Switching Phenomenon during Oral Presentations among the Business Programme Students. IAFOR Journal of Education, 9(5), 85-100.
42. Sudarja, K. (2019). Alih Kode dan Campur Kode dalam Proses Pengajaran Bahasa Indonesia. ALFABETA: Jurnal Bahasa, Sastra, dan Pembelajarannya, 2(2), 35-49.
43. Sukarno, S. (2018). Politeness strategies, linguistic markers and social contexts in delivering requests in Javanese. Indonesian Journal of Applied Linguistics, 7(3), 659-667. https://doi.org/10.17509/ijal.v7i3.9816
44. Sulaiman, N. A., Raki, D. A., & Shaid, N. A. N. (2022). Learners’ Reactions toward Their
45. Teachers’ use of Code-Switching in ESL Classroom. International Journal of Academic Research in Business and Social Sciences. 12(6), 1130 – 1141.
46. Sutrismi, S. (2014). The use of Indonesian English code mixing and code switching in social media network (Facebook) by Indonesian youngster. Surakarta: Muhammadiyah University of Surakarta.
47. Suwito. (1983). Pengantar awal sosiolinguistik: teori dan problema. Surakarta: Henary Offset Solo.
48. Tasnim, Z. (2018). Nature Of Code-Switching Among The Bangladeshi Tertiary Level Facebook Users. People: International Journal of Social Science, 4(2), 709-725.
49. Ulfah, N. M., Tsuraya, A. S., & Risal, R. (2021). The use of code-switching by English teachers in foreign language classroom. English Language, Linguistics, and Culture International Journal, 1(1), 11-23.
50. Wardaugh, R. 1986. An Introduction to Sociolinguistics: First Edition. London: Blackwell Publishers.
51. Wardhaugh, R. (2006). An introduction to sociolinguistics (5th ed). Oxford: Blackwell.
52. Younas, M., Afzaal, M., Noor, U., Khalid, S., & Naqvi, S. (2020). Code Switching in ESL Teaching at University Level in Pakistan. English Language Teaching, 13(8), 63-73.
53. Yuliana, N., Luziana, A.R., Sarwendah, P. (2015). Code-Mixing and Code-Switching Of Indonesian Celebrities: A Comparative Study. Journal Lingua Cultura, 9, 47-54.