Sakti, Rizki Hardian, and Sukardi Sukardi. 2021. “Computer Based Instruction (CBI)-Flipped Classroom Development in Learning: The experts’ Validity”. Jurnal Pembangunan Pendidikan: Fondasi Dan Aplikasi 9 (1):75-81. https://doi.org/10.21831/jppfa.v9i1.37322.