Aristyani, Karennina, and Siti Hidayati. “VALIDITY OF SCIENCE BOOK ORIENTED SETS IN ENVIRONMENTAL POLLUTION MATERIAL FOR JUNIOR HIGH SCHOOL STUDENTS”. PENSA: E-JURNAL PENDIDIKAN SAINS 8, no. 2 (July 1, 2020): 174-177. Accessed May 3, 2024. https://ejournal.unesa.ac.id/index.php/pensa/article/view/38347.