Batu, Purnama Nancy Lumban, and Wida Cahyaningrum. “Outdoor Learning for Cadets of Maritime Higher Education Institute: The Students’ Perspective”. Biormatika : Jurnal ilmiah fakultas keguruan dan ilmu pendidikan 6, no. 02 (September 25, 2020): 36–41. Accessed November 22, 2024. https://ejournal.unsub.ac.id/index.php/FKIP/article/view/798.