Ferdyan, R., F. Arsih, M. Fadilah, D. H. Putri, and A. Razak. “Validity of Digital-Based COVID-19 Preventive Supplement Book to Empower Scientific Literacy and Critical Thinking Skills of Senior High School Students”. International Journal on Integrated Education, Vol. 5, no. 3, Mar. 2022, pp. 76-82, doi:10.17605/ijie.v5i3.2811.