Fitriyanti Sahra, Intan, and Sjaeful Sahra. “The Importance of Developing E-Books Using The 4S-TMD Method to Improve Environmental Literacy”. KnE Social Sciences 9, no. 8 (April 3, 2024): 157–165. Accessed July 17, 2024. https://knepublishing.com/index.php/KnE-Social/article/view/15503.