Kusmantoro, Rapaela, AND Rahayuningsih, Idha. " 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) [Online], Volume 2 Number 1 (10 January 2023)