Source:Smith, E. A., & Malone, R. E. (2009). “Everywhere the Soldier Will Be”: Wartime Tobacco Promotion in the US Military. American Journal of Public Health, 99(9), 1595–1602. http://doi.org/10.2105/AJPH.2008.152983
Source:Reif, John, Christa Bruns, and Kimberly Lower. “Cancer of the Nasal Cavity and Paranasal Sinuses and Exposure to Environmental Tobacco Smoke in Pet Dogs.” American Journal of Epidemiology. 147(5). 1998. Web.
Source:"Smoking and Tobacco Control." U.S. Department of Health and Human Services, Public Health Service, National Institutes of Health, National Cancer Institute. Risks Associated with Smoking Cigarettes with Low Machine-Measured Yields of Tar and Nicotine. 19 Nov. 2001: 180.