Agustina, Titik. “English for Specific Purposes (ESP): An Approach of English Teaching for Non-English Department Students”. Beta: Jurnal Tadris Matematika 7, no. 1 (May 15, 2014): 37–63. Accessed June 10, 2026. https://jurnalbeta.ac.id/index.php/betaJTM/article/view/43.