Yuberti, Yuberti, et al. “Designing and Developing Android-Based E-Book As a Guide for Students in Making Smart-Key: A Learning Media for Electronic Circuits Course”. Jurnal Penelitian Pendidikan IPA, vol. 9, no. SpecialIssue, Dec. 2023, pp. 428-37, doi:10.29303/jppipa.v9iSpecialIssue.4502.