Fadli, Azwar, Harun Sitompul, and Keysar Panjaitan. “Drone E-Job Sheet Development: Geospatial Engineering Remote Sensing Subject ”. Randwick International of Education and Linguistics Science Journal 5, no. 3 (September 30, 2024): 1128-1143. Accessed June 25, 2026. https://www.randwickresearch.com/index.php/rielsj/article/view/1065.