Sudarsana W, Sarwanto S, Marzuki A. Development of Discovery Learning-based E-modules Using PDF Flip Professional Software Integrated with the Website as An Alternative to Learning Physics During the Covid 19 Pandemic. jppipa, pendidikan ipa, fisika, biologi, kimia [Internet]. 2021 Sep. 22 [cited 2024 Nov. 23];7(4):519-24. Available from: https://jppipa.unram.ac.id/index.php/jppipa/article/view/786