Sinaga, Osberth, Daulat Saragi, Halking Halking, and Deny Setiawan. “Citizen Project Based on Problem Solving Skills”. Randwick International of Education and Linguistics Science Journal 5, no. 3 (September 30, 2024): 1164-1175. Accessed April 19, 2026. https://mail.randwickresearch.com/index.php/rielsj/article/view/1068.