Dirgantoro, Kurnia Putri Sepdikasari, Robert Harry Soesanto, and Yanti Yanti. “A Preliminary Study on the Formulation of Indicators and Definitions of Mathematical Bitterness Related to Teacher Treatment”. Jurnal Elemen 9, no. 1 (January 2, 2023): 84–97. Accessed November 22, 2024. https://e-journal.hamzanwadi.ac.id/index.php/jel/article/view/6637.