Harlis and Dara Mutiara Aswan 2024. The Need for an Interactive Cell Biology Textbook Based on Case Studies by Integrating QR Codes. Jurnal Penelitian dan Pengembangan Pendidikan. 8, 2 (Aug. 2024), 365–373. DOI:https://doi.org/10.23887/jppp.v8i2.54841.