Kusmantoro, Rapaela, and Idha Rahayuningsih. “The Effect of Learning Achievement on Schadenfreude With Self Esteem Mediation on Students of SMAN 1 Kebomas Grade Eleven”. Journal Universitas Muhammadiyah Gresik Engineering, Social Science, and Health International Conference (UMGESHIC) 2, no. 1 (January 10, 2023): 138–147. Accessed June 9, 2025. https://journal.umg.ac.id/index.php/umgeshic/article/view/5117.