Siki.A. Novinda Putri, Putu Nanci Riastini, and Made Vina Arie Paramita. “Project-Based Learning Electronic Thematic Student Worksheets (E-Book PJBL) Improving Critical Thinking Skills”. International Journal of Elementary Education, vol. 6, no. 3, Nov. 2022, pp. 501-10, doi:10.23887/ijee.v6i3.53497.