Ahmad, Fandi, and Nur Indah Sari. “Improvement of Biology Learning Results Through the Application of Problem-Based Instruction Approach Oriented Think Pair Share Learning Model”. Journal of Applied Science, Engineering, Technology, and Education 1, no. 1 (April 29, 2019): 88-93. Accessed August 6, 2021. https://jurnal.ahmar.id/index.php/asci/article/view/49.