Lestari, Wulan, Tri Ariani, and Ovilia Gumay. 2018. “Pengembangan Bahan Ajar Fisika Berbasis Scientific Approach”. SPEJ (Science and Physic Education Journal) 2 (1), 18-29. https://doi.org/https://doi.org/10.31539/spej.v2i1.435.