Rathakrishnan, Balan, Soon Singh Bikar Singh, Mohd Fahmi Ghazali, Azizi Yahaya, Noor Hassline Mohammed, and Mohammad Rahim Kamaluddin. “Association Between Quality of Sleep and Academic Performance: Evidence from Undergraduate Students from Sabah, Malaysia”. International Journal of Academic Research in Progressive Education and Development 10, no. 1 (March 19, 2021). Accessed July 12, 2025. https://ijarped.com/index.php/journal/article/view/2258.