Astuti NW, Octavia B. Development of Problem-Based Student Worksheet on Environmental Change Material. jppipa, pendidikan ipa, fisika, biologi, kimia [Internet]. 2023 Dec. 20 [cited 2024 May 19];9(12):10916-22. Available from: https://jppipa.unram.ac.id/index.php/jppipa/article/view/5678