Rizka, C., F. Harahap, and S. Edi. “Validity of Research Based Book on Isolation, Amplification, and Visualization Material for Biotechnology Course in Higher Education”. META: Journal of Science and Technological Education, vol. 1, no. 1, June 2022, pp. 1-22, https://meta.amiin.or.id/index.php/meta/article/view/1.