Septiani DA, Handayani AAAT, Hermansyah H, Syukur A, Jamaluddin J. E-module innovation as a learning solution for chemistry course during the pandemic based on problem-based learning. J. Pijar.MIPA [Internet]. 2021 Sep. 4 [cited 2024 May 6];16(4):459-65. Available from: http://jurnalfkip.unram.ac.id/index.php/JPM/article/view/2747