Azmi ZL, Fathurohman A, Marlina L. The Validity and Practicality of Student Worksheets on Waves and Sounds for Junior High School Students . jppipa, pendidikan ipa, fisika, biologi, kimia [Internet]. 2022 Oct. 31 [cited 2024 Apr. 25];8(4):1764-70. Available from: https://jppipa.unram.ac.id/index.php/jppipa/article/view/1797