Rahman M, Ramdani A, Jamaluddin J. The Validity of Science Learning Devices Based on the 7E Learning Cycle Model to Improve Concept Mastery of Junior High School Students. J. Prisma. Sains [Internet]. 2021 Jun. 30 [cited 2025 Aug. 15];9(1):108-13. Available from: https://e-journal3.undikma.ac.id/index.php/prismasains/article/view/3976