Ihsan, Emira, and Hardeli Hardeli. “Development of Petroleum E-Module Based on Scientific Approach for Senior High School Grade XI”. Entalpi Pendidikan Kimia 2, no. 4 (December 25, 2021): 39-45. Accessed July 8, 2024. http://entalpipendidikan.ppj.unp.ac.id/index.php/epk/article/view/199.