Sakti, Rizki Hardian, and Sukardi Sukardi. “Computer Based Instruction (CBI)-Flipped Classroom Development in Learning: The experts’ Validity”. Jurnal Pembangunan Pendidikan: Fondasi dan Aplikasi 9, no. 1 (October 18, 2021): 75–81. Accessed May 15, 2025. https://jurnal.uny.ac.id/index.php/jppfa/article/view/37322.