Asalla, Lydiawati Kosasih. “Meningkatkan Kualitas Blended Learning: Case Study Menggunakan CoI Model”. ComTech: Computer, Mathematics and Engineering Applications 1, no. 2 (December 1, 2010): 770–781. Accessed May 31, 2025. https://journal.binus.ac.id/index.php/comtech/article/view/2585.