Dr. M.P.P.U Chulasiri, N.S.Gunawardena, and G.A.C. De Silva. “Prevalence of Smoking Among Adult Males in Colombo District, Sri Lanka”. Asian Pacific Journal of Health Sciences 3, no. 4(S) (December 31, 2016): 73–80. Accessed December 22, 2024. https://apjhs.com/index.php/apjhs/article/view/580.