Kurniawan, Nova Adi, 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 3, no. 2 (May 31, 2025): 1344–1353. Accessed October 6, 2025. https://ejournal.yayasanpendidikandzurriyatulquran.id/index.php/AlZayn/article/view/1925.