Ibrahim, Doa’a Anwar, and Abdulsalam Halboup. “Self-Medication Practice Among Health Sciences Undergraduate Students in Sana’a City-Yemen”. International Journal of Pharmaceutical Investigation 9, no. 2 (September 16, 2019): 80-84. Accessed September 16, 2021. https://www.jpionline.org/index.php/ijpi/article/view/375.