1. Abayazeed, S., M. N., & Abdalla, A. Y. (2015). Investigating the causes behind pronunciation problems facing Sudanese university students majoring in English: A case study of Khartoum University Faculty of Arts, English department. International Journal of Science and Research (IJSR), 6(6), 147-150. https://www.ijsr.net/archive/v6i6/ART20174125.pdf
2. Ahangari, S., Rahbar, S., & EntezariMaleki, S. (2015). Pronunciation or listening enhancement: Two birds with one stone. International Journal of Language and Applied Linguistics, 1(2), 13-19.
3. Ahmad, H. (2012). Relationship between watching films and students' pronunciation mastery among seventh-grade students at SMPN1 Pakem in the academic year of 2011/2012. S1 thesis, UNIVERSITAS NEGERI YOGYAKARTA. http://eprints.uny.ac.id/id/eprint/9077
4. Arshina, M., & Shahrokhi, M. (2016). Mobile-assisted language learning: English pronunciation among Iranian pre-intermediate EFL learners. Journal of Applied Linguistics and Language Research, 3(4), 149-162. http://www.jallr.com/index.php/JALLR/article/view/334
5. International Symposium on Applied Phonetics (ISAPh 2016)