N. A. Rahman, E. R. Koroy, D. Liestianti, S. Umar, and T. Setiawan, “Development of Interactive E-Modules Based-Kvisoft Flipbook Maker Pro in Direct Learning on Redox Reaction Materials”, eduline j. educ. learn. innov., vol. 2, no. 4, pp. 427–435, Oct. 2022.