Sahir, A., and F. Basbeth. “Knowledge and Attitudes of Students of Faculty of Medicine, Yarsi University Regarding Hepatitis B Vaccine Viewed from the Medical Perspective and the Overview of Islamic Side”. INTERNATIONAL JOURNAL OF ETHICS, TRAUMA & VICTIMOLOGY, Vol. 5, no. 02, May 2020, pp. 20-24, https://www.ijetv.org/index.php/IJETV/article/view/1034.