Noor Aqilah Ashamuddin, et al. “HIV Among Blood Donors in Perak, Malaysia: A Review from 2015 to 2019”. Asian Journal of Medicine & Health Sciences, vol. 5, no. 1, June 2022, pp. 13-24, https://ejournal.unikl.edu.my/index.php/ajmhs/article/view/116.