Suwadarma KW, Sudiatmika AAIAR, Suja IW. The Validity and Practicality of the Chemistry Learning Device by Using STEM-PjBL Model. JIPP [Internet]. 2020 Mar. 20 [cited 2024 Nov. 29];4(1):19-28. Available from: https://ejournal.undiksha.ac.id/index.php/JIPP/article/view/24150