Moch. Iswan Perangin-angin, Ambiyar, Indrati Kusumaningrum. “The Effectiveness of Project-Based Blended Learning Models in Cryptography Courses”. Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 14 (September 14, 2021): 3557–3568. Accessed April 30, 2024. https://www.turcomat.org/index.php/turkbilmat/article/view/10967.