Sempo, Muhammad Widus, and Norullisza Khosim. “Said Nursi’s Thoughts on Environmental Sustainability in Risale-I Nur”. Afkar: Jurnal Akidah dan Pemikiran Islam (October 30, 2020): 107–132. Accessed November 22, 2024. https://ejournal.um.edu.my/index.php/afkar/article/view/26907.