Laksana, I Putu Yoga, Ni Nyoman Yuliantini, Ni Ketut Suciani, I Putu Yoga Purandina, and Gary P. Boyce. “Employing E-Portfolio Based Learning in Improving Self-Efficacy of student’s Speaking Ability”. Journal of Applied Studies in Language 5, no. 2 (December 7, 2021): 229–236. Accessed November 25, 2024. https://ojs2.pnb.ac.id/index.php/JASL/article/view/22.