Fitriani, Vivi, dan Novita Sari. “VALIDITY PRACTICAL GUIDE OF MATERIALS BIOTECHNOLOGY IN CLASS XII SMA MA”. Jurnal Pelita Pendidikan 8, no. 1 (Mei 1, 2020). Diakses Juli 3, 2025. https://jurnal.unimed.ac.id/2012/index.php/pelita/article/view/15643.