Dewantara, Billy Julian, and Aman Aman. “Implementation of Nationalism Value in Ubrug Based Learning”. Jurnal Civics: Media Kajian Kewarganegaraan 20, no. 2 (October 31, 2023): 292–301. Accessed February 12, 2026. https://jurnal.uny.ac.id/index.php/civics/article/view/63887.