Sinaga, Yohanes Septian, and Adaninggar Septi Subekti. “Self-Efficacy in Four Language Skills of Indonesian L2 Learners of English: A Comparative Survey Study”. LITERA 24, no. 1 (March 31, 2025): 61–72. Accessed July 1, 2025. https://journal.uny.ac.id/index.php/litera/article/view/77904.