Kurniawan, N. A., and M. Ridhwan. “Fostering Joyful Engagement: Integrating Positive Psychology Activities in English for Specific Purposes (ESP) Classrooms for Non-English Majors”. Al-Zayn : Jurnal Ilmu Sosial & Hukum, vol. 3, no. 2, May 2025, pp. 1344-53, doi:10.61104/alz.v3i2.1925.