A. F. Baharuddin and D. R. H. P. Rustan, “Investigating Intrinsic and Extrinsic Factors Influencing English Self-Learning Motivation Among Indonesian University Students”, J. Engl. Lang. Teach. Fak. Pendidik. Bhs. Seni Program Studi Pendidik. Bhs. Ingg. IKIP Mataram, vol. 12, no. 1, pp. 103–116, Jun. 2025.