Mashartanto, Achmad Ali, Wibisana Pranata, and Syafni Yelvi Siska. “Development of Learning Media Maritime English Textbook for Ratings Forming”. Journal of Languages and Language Teaching 12, no. 3 (July 19, 2024): 1238–1252. Accessed August 15, 2025. https://e-journal3.undikma.ac.id/index.php/jollt/article/view/11337.