Nuryanto, and Nahadi. “Electronic Portfolio Assessment Strategy Using Google Classroom to Improve Students’ Abilities in Learning Chemistry”. Jurnal Penelitian Pendidikan IPA 9, no. SpecialIssue (December 25, 2023): 885–892. Accessed July 1, 2024. https://jppipa.unram.ac.id/index.php/jppipa/article/view/6162.