Ling, Leh Qing. “ Sleep Quality And Academic Performance Among UMS Students”.
Jurnal Psikologi dan Kesihatan Sosial
8, no. 1 (December 6, 2024): 1–18. Accessed June 12, 2025. https://jurcon.ums.edu.my/ojums/index.php/JPKS/article/view/5696.