Rahmatsyah SW, Dwiningsih K. Development of Interactive E-Module on The Periodic System Materials as an Online Learning Media. jppipa, pendidikan ipa, fisika, biologi, kimia [Internet]. 2021 Apr. 19 [cited 2024 Nov. 23];7(2):255-61. Available from: https://jppipa.unram.ac.id/index.php/jppipa/article/view/582