1. Effects of sheesha and cigarette smoking on pulmonary function of Saudi males and females;Al-Fayez;Tropical and Geographical Medicine,1988
2. American Cancer Society [ACS]. (2009, October). Secondhand smoke. Retrieved November 10, 2009, from http://www.cancer.org/docroot/ped/content/ped_10_2x_secondhand_smoke-clean_indoor_air.asp
3. American Lung Association [ALA]. (2007, February). Tobacco policy trend alert: an emerging deadly trend: waterpipe tobacco use. Retrieved April 1, 2007, from http://slati.lungusa.org/alerts/Trend%20Alert_Waterpipes.pdf
4. American Nonsmokers' Rights Foundation. (2009, January 4). Overview list: How many smokefree laws. Retrieved February 3, 2009, from http://www.no-smoke.org/pdf/mediaordlist.pdf
5. Saliva cotinine and exhaled carbon monoxide levels in natural environment waterpipe smokers;Bacha;Inhalation Toxicology,2007