Roaa R Amer, Roaa R Amer, and Adel F Yasky. “The Effect of Primary Care Physicians on Smoking Habits”. Global Journal of Medical Research 17, no. K4 (March 15, 2017): 13–16. Accessed June 21, 2025. https://medicalresearchjournal.org/index.php/GJMR/article/view/1395.