“DEVELOPMENT OF INTEGRATED NATURAL SCIENCE ELECTRONIC CHAPTER BOOK WITH CONTEXTUAL APPROACH ON THE MATERIAL GLOBAL WARMING FOR CLASS VII SMP”. UNIVERSE : Journal of Science Education Teaching and Learning 3, no. 1 (July 31, 2022): 28–33. Accessed November 3, 2026. https://universe.ppj.unp.ac.id/index.php/universe/article/view/141.