Hidayat R, Imami MKW, Liu S, Qudratuddarsi H, Mohd Saad MR. VALIDITY OF ENGAGEMENT INSTRUMENT DURING ONLINE LEARNING IN MATHEMATICS EDUCATION. Jur. Ilmh. Ilm. Ter. Un. Ja [Internet]. 2024 Sep. 14 [cited 2025 Jul. 16];8(2):467-84. Available from: https://online-journal.unja.ac.id/JIITUJ/article/view/34453