Chen, A.-H., N. F. Abu Bakar, and N. Congdon. “Conceptual Development of Paediatric Vision Questionnaire for Opportunistic Screening in Optometry and Ophthalmology Clinics”. Healthscope: The Official Research Book of Faculty of Health Sciences, UiTM, vol. 4, no. 1, Oct. 2021, pp. 73-81, http://healthscopefsk.com/index.php/research/article/view/213.