D. Darmawan, S. A. Nurjanah, A. Solihin, A. Hidayat, and L. Setiawati "Implementation of Blended Learning Models to Improve Student Learning Outcomes in Junior High School", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 2, pp. 374–377, 2021, doi: 10.25046/aj060243.