Lestari, W., T. Ariani, and O. Gumay. “Pengembangan Bahan Ajar Fisika Berbasis Scientific Approach”. SPEJ (Science and Physic Education Journal), Vol. 2, no. 1, Dec. 2018, pp. 18-29, doi:https://doi.org/10.31539/spej.v2i1.435.