Nurhadi, Nurhadi, and Muhammad Irhamuddin Harahap. “Teacher’s Responsibility in Islamic Education (Relevance of Hamka and Hasan Langgulung Thought)”. PALAPA 9, no. 1 (May 25, 2021): 137-181. Accessed June 6, 2026. http://www.ejournal.stitpn.ac.id/index.php/palapa/article/view/1065.