Sari DV, Kusmariyatni N. The Validity of the Pop-Up Book Media on Puberty Topics for Sixth Grade Elementary School. International j.of Elementary Education [Internet]. 2020 Jul. 23 [cited 2024 Dec. 2];4(2):179-86. Available from: https://ejournal.undiksha.ac.id/index.php/IJEE/article/view/25295