Mufida, S. N., D. V. Sigit, and R. H. Ristanto. “Integrated Project-Based E-Learning With Science, Technology, Engineering, Arts, and Mathematics (PjBeL-STEAM): Its Effect on Science Process Skills”. Biosfer, Vol. 13, no. 2, Oct. 2020, pp. 183-00, doi:10.21009/biosferjpb.v13n2.183-200.