Usman MH, Al Idrus A, Doyan A, Soeprianto H, Hakim A. Teacher Basic Skills in Learning Science in Junior High Schools Facing the 21st Century. jppipa, pendidikan ipa, fisika, biologi, kimia [Internet]. 2021 May 29 [cited 2024 Jul. 6];7(3):331-4. Available from: https://jppipa.unram.ac.id/index.php/jppipa/article/view/652