Mazni Mustapha, Thurgha A/P Ramasamy, and Noorma Razali. 2026. “Investigating the Interactional Effects of Socio-Demographic Factors and Sleep Quality on Academic Achievement Among Malaysian Undergraduate Students: Mengkaji Kesan Interaksi Faktor Sosio-Demografik Dan Kualiti Tidur Ke Atas Pencapaian Akademik Dalam Kalangan Pelajar Pra-Siswazah Malaysia”. Jurnal Psikologi Dan Kesihatan Sosial 6 (1):9 -. https://doi.org/10.51200/jpks.v6i1.5709.