1. Bayyurt, Y. (2018). Issues of intelligibility in World Englishes and EIL contexts, World Englishes, 37, 407-415.
2. Bolton, K. (2004). ‘World Englishes’. In A. Davies & C. Elder (Eds.), The handbook of applied linguistics (pp. 296-367). Oxford: Blackwell Publishing Ltd.
3. Bolton, K., & Davis, D. R. (2018) Larry Smith and world Englishes. World Englishes, 37, 447-454.
4. Catford, J. (1950). Intelligibility. English Language Teaching, 1, 7-15.
5. Creswell, J. W. (2014). Educational research: Planning, conducting and evaluating Quantitative and qualitative research (4th ed.). Essex: Pearson Education Limited.
6. Dörnyei, Z., & Ushioda, E. (2011). Teaching and researching motivation (2nd ed). New York, NY: Routledge.
7. Gardner, R. C. (1985). Social psychology and second language learning: The role of attitudes and motivation. London: Edward Arnold.
8. Gardner, R. C. (2007). Motivation and second language acquisition. Porta Linguarium, 8, 9-20.
9. Gardner, R. C. (2010). Motivation and second language acquisition: The socio educational model. New York: Peter Lang Publishing, Inc.
10. Gardner, R. C. & Lambert, W. E. (1972). Attitudes and Motivation in Second-Language Learning. Massachusetts: Newbury House Publishers, Inc.
11. Ghazvini, S. D., & Khajehpour, M. (2011). Attitudes and motivation in learning English as a second language in high school students. Procedia Social and Behavioral Sciences, 15, 1209-1213.
12. Ghobain, E. (2016). World Englishes and intelligibility in English-medium classrooms. Journal of Applied Linguistics and Language Research. 3(2), 202-215.
13. Hiew, W. (2012). English language teaching and learning issues in Malaysia: Learners' perceptions via Facebook dialogue journal. International Refereed Research Journal, 3(1).
14. Jayapalan, K., & Pillai, S. (2011). The state of teaching and learning English pronunciation in Malaysia: A preliminary study. Malaysian Journal of ELT Research, 7(2), 63-81.
15. Jeong, H., Thorén, B., & Othman, J. (2020). Effect of altering three phonetic features on intelligibility of English as a lingua franca: A Malaysia speaker and Swedish listeners. Asian Englishes, 22(1), 2-19.
16. Jenkins, J. (2015). Global Englishes: A resource book for students. London: Routledge.
17. Kachru, B. B. (1986). The power and politics of English. World Englishes, 5(2/3), 121-140.
18. Kachru, B. B. (1992). World Englishes: Approaches, issues and resources. Language Teaching, 25 (1), 1-14.
19. Kachru, B. B., & Nelson. C. L. (1996). World Englishes. In S. L. McKay & N. H. Hornberger. (Eds.), Sociolinguistics and language teaching (pp. 71-102). New York: Cambridge University Press.
20. Kachru, Y., & Smith, L. E. (2008). Cultures, contexts, and World Englishes. New York: Routledge.
21. Kaur, J. (2018). The intelligibility of English in global contexts: Concepts, methods, findings and implications. Foreign Language Education Research, 22, 1-10.
22. Krashen, S. D. (2002). Second language acquisition and second language learning. doi:10.2307/326882
23. Lai, T. H. (2013). The motivation of learners of English as a foreign language revisited. International Education Studies. 6(10), 90-101.
24. Mahboob, A., & Szenes, E. (2010). Construing meaning in World Englishes. In A. Kirkpatrick (Ed.), The Routledge handbook of World Englishes (pp. 580-598). Oxon: Routledge.
25. Matsuura, H., Chiba, R., & Ara, Satoshi. (2012). International intelligibility of learner English. Shogaku Ronshu, 81, 63-74.
26. Mohan Muniandy, Gopala Krishnan Sekharan Nair, Shashi Kumar Krishnan, Irma Ahmad, & Norashikin Mohamed Noor. (2010). Sociolinguistic competence and Malaysian students' English language proficiency. English Language Teaching, 3(3), 145-151.
27. Nelson, C. L. (2011). Intelligibility in World Englishes: Theory and Application. New York: Routledge.
28. Saville-Troike, M. (2012). Introducing second language acquisition. New York: Cambridge University Press.
29. Smith, L. E. (1992). Spread of English and issues of intelligibility. In B. B. Kachru (Ed.), The other tongue: English across cultures (2nd ed.)(pp. 75-90). Urbana, IL: University of Illinois Press.
30. Smith, L. E. & Nelson, C. L. (2020). World Englishes and Issues of Intelligibility. In C. L. Nelson, Z. G. Proshina & D. R. Davis (Eds.), The Handbook of World Englishes (2nd ed.)(pp. 430-446). Hoboken, New Jersey: John Wiley & Sons, Inc.
31. Teh, J. L., & Pilus, Z. (2019). International students' perspectives of Malaysian English teachers' spoken English. Indonesian Journal of Applied Linguistics, 8, 554-566.
32. Tengku Sapora, T. M., & Sepideh, M. J. (2012). Motivation, its types and its impacts in language learning. International Journal of Business and Social Science, 3(24), 230-235.
33. Thang, S. M., Ting, S. L., & Nurjanah Mohd Jaafar (2011). Attitudes and motivation of Malaysian secondary students towards learning english as a second language: A case study. 3L: The Southeast Asian Journal of English Language Studies, 17(1), 40-54.
34. Wahiza Wahi. (2015). English language literacies of undergraduate students in Malaysia's culturally and linguistically diversi environment: Casualties of national language policies and globalisation? Educational Research and Perspectives, 42, 329-362.
35. Yano, Y. (2009). English as an International Lingua Franca: From societal to individual. World Englishes, 28(2), 246-255.