Dewi, Shelena Nugraha R, Reduk Nilawarni, and Rusdi Rusdi. “Differences in The Application of Conceptual Understanding Procedures Model (CUPs) and Concept Attainment Model (CAM) on Student’s Misconception Reduction in Digestive System Material”. Biosfer: Jurnal Pendidikan Biologi 8, no. 1 (January 17, 2018): 10-19. Accessed December 15, 2019. http://journal.unj.ac.id/unj/index.php/biosfer/article/view/5593.