Ihsan, Muhammad, Saprizal Hadisaputra, Agus Ramdani, and Agil Al Idrus. “COMPUTER BASED CONCEPT UNDERSTANDING INSTRUMENS IN CHEMICAL LEARNING”. JURNAL INOVASI PENDIDIKAN DAN SAINS 1, no. 1 (April 27, 2020): 26-29. Accessed December 4, 2022. http://ejournal.unwmataram.ac.id/JIPS/article/view/253.