Y. Valfa, A. . Razak, S. Fajrina, and E. Yuniarti, “Development of a Biology E-Module Based on Google Sites on Circulatory System and Digestive System Material”, jppipa, pendidikan ipa, fisika, biologi, kimia, vol. 9, no. SpecialIssue, pp. 52–61, Dec. 2023.