Surur, M., S. Dian Nurtjahyani, A. Agusti, and I. Yana. “The Effect of Project Based Learning on Digital Literacy Skills and Conceptual Understanding in an Online-Based Flipped Classroom Environment”. Edumaspul: Jurnal Pendidikan, Vol. 7, no. 1, Mar. 2023, pp. 849-56, doi:10.33487/edumaspul.v7i1.5681.