Lubis, Nurjannah, Sjaeful Anwar, and Omay Sumarna. “Developing a Hydrocarbon Electronic Book to Develop Students Critical Thinking Skills Through the 4S TMD Method”. KnE Social Sciences 9, no. 8 (April 3, 2024): 291–298. Accessed February 6, 2025. http://thrillriftranks.com/index.php/KnE-Social/article/view/15561.