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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 (Aug. 2026), 9 –. DOI:https://doi.org/10.51200/jpks.v6i1.5709.