Ronald K. Bokau, Joe, and Egbert Edward Djajasasana. “Efektivitas Blended Learning Pada Mata Kuliah Ilmu Pelayaran Astronomi”. Journal of Education Research 4, no. 4 (October 29, 2023): 1708–1715. Accessed August 23, 2025. https://mail.jer.or.id/index.php/jer/article/view/464.