Novalinda, R.; Giatman, M.; Syahril; Wulansari, R. E.; Trung Tin, C. Constructivist Computer-Based Instruction (CBI) Approach: A CBI Flipped Learning Integrated Problem Based and Case Method (PBL-Cflip) in Clinical Refraction Course. Int. J. Onl. Eng. 2023, 19, pp. 42-56.