Yen, Khor Poh. “Contributory Factors to the Smoking of Shisha Among Teenagers in the Perak City of Ipoh: A Preliminary Qualitative Survey”. International Journal of Public Health Research 2, no. 1 (March 1, 2012): 80–84. Accessed April 29, 2024. https://spaj.ukm.my/ijphr/index.php/ijphr/article/view/127.