Putri RD, Suprapto PK, Nuryadin E. Google Classroom-based Online Learning Study Outcomes on Reproductive Concept in Science Classes. BES [Internet]. 2021 Apr. 30 [cited 2024 Nov. 22];5(1):7-14. Available from: https://journal.uhamka.ac.id/index.php/bioeduscience/article/view/5241