Nugroho, Albertus Erico Jerry Krisna, Sugiyanto Sugiyanto, and Singgih Prihadi. “Exploring Joyful, Mindful, and Meaningful Learning in Surakarta High School Geography Education”. Indonesian Journal of Educational Development (IJED) 7, no. 2 (August 17, 2026): 535–552. Accessed August 19, 2026. https://ojs.mahadewa.ac.id/index.php/ijed/article/view/6667.