Suwadarma, K W, A A I A R Sudiatmika, and I W Suja. 2020. “The Validity and Practicality of the Chemistry Learning Device by Using STEM-PjBL Model”. Jurnal Ilmiah Pendidikan Dan Pembelajaran 4 (1):19-28. https://doi.org/10.23887/jipp.v4i1.24150.