Source:Cullen, Jennifer, et al. "Depictions of Tobacco Use in 2007 Broadcast Television Programming Popular Among US Youth." Archives of Pediatric and Adolescent Medicine. 165(2). 07 Feb. 2011: 147-151. Web.
Source:"Preventing Tobacco Use Among Youth and Young Adults: A Report of the Surgeon General Executive Summary." U.S. Department of Health and Human Services, Public Health Service, Office of the Surgeon General. 2012.
Source:"The Health Consequences of Smoking—50 Years of Progress. A Report of the Surgeon General." U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, National Center for Chronic Disease Prevention and Health Promotion, Office on Smoking and Health. Smoking-Attributable Morbidity, Mortality, and Economic Costs, 2014. Report.