Bachtiar, B. “Fostering Student Learning: EFL Teachers’ Pedagogical Competence and Subject Content on Students’ Achievement”. Indonesian EFL Journal: Journal of ELT, Linguistics, and Literature, Vol. 2, no. 1, July 2016, pp. 55-69, https://ejournal.kopertais4.or.id/mataraman/index.php/efi/article/view/1926.