1. Afkar, D. W. (2019). An analysis Powtoon as media for teaching english writing for Junior High School Students (Doctoral dissertation, UIN Sunan Ampel Surabaya)
2. Ajzen, I. (1985). From intention to actions: a theory of planned behaviour. In J. Kuhl & J. Beckmann (Ed.), Action Control: From Cognition to Behaviour (11-39). Berlin, New York: Springer
3. Ajzen, I. (2006). Constructing a theory of planned behavior questionnaire.
4. Cronbach, L. J. (1951). Coefficient alpha and the internal structure of tests. Psychometrika, 16(3), 297–334. doi:10.1007/bf02310555.
5. Edmons, T.J., 8Branch, R. M. (2002). Survey of Instructional Development Models (4th ed). Syracuse, NY: Eric CleareingHouse on Information.
6. Kline, R. B. (2005). Principles and practice of structural equation modeling 2nd ed. New York: Guilford.
7. Latchanna, G. & Dagnew, A. (2009). Attitude of teachers towards the use of active learning methods. E-journal of All India Association for Educational Research, 21(1), http://www.ejournal.aiaer.net/vol21109/12.%20Latchana%20&%20Dagnew.pdf
8. Lennartsson, F. (2008). Students' motivation and attitudes towards learning a second language: British and Swedish students' points of view. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-2571.
9. Muhamad, A., Adnan, M. N., & Mohamed, M. A. (2017). Pembelian Produk Tiruan di Malaysia: Pengaruh Sikap Dan Niat Pengguna. International Journal of Accounting, Finance and Business. 2 (5), 152-162.
10. Oroujlou, N., & Vahedi, M. (2011). Motivation, attitude, and language learning. Procedia-Social and Behavioral Sciences, 29, 994-1000.
11. Pinter, A. (2006). Teaching young language learners. Oxford: Oxford University Press
12. Semaan, C., & Ismail, N. (2018). The effect of Using Powtoon on Learning English As a Foreign Languange.
13. Syafitri, A., Asib, A., & Sumardi, S. (2018). An application of Powtoon as a digital medium: Enhancing students’ pronunciation in speaking. International Journal of Multicultural and Multireligious Understanding, 5(2), 295-317.
14. Taber, K. S. (2018). The use of Cronbach’s alpha when developing and reporting research instruments in science education. Research in Science Education, 48(6), 1273-1296.