Hardi HR, Muhammad, and Besse Wahida. “E-Books As Digital Learning Resources in Higher Education: A Systematic Literature Review”. Pedagogi : Jurnal Pendidikan dan Pembelajaran 6, no. 1 (June 8, 2026): 54–65. Accessed June 20, 2026. https://journal.actual-insight.com/index.php/pedagogi/article/view/4165.