1. U.S. Department of Health and Human Services. Preventing Tobacco Use Among Youth and Young Adults: A Report of the Surgeon General. Atlanta, GA: Centers for Disease Control and Prevention, National Center for Chronic Disease Prevention and Health Promotion, Office on Smoking and Health; 2012. www.surgeongeneral.gov/library/ reports/preventing-youth-tobacco-use/index.html. Accessed April 20, 2015.
2. Tobacco and marijuana use among adolescents and young adults: A systematic review of their co-use
3. Age of first cigarette, alcohol, and marijuana use among U.S. biracial/ethnic youth: A population-based study
4. Substance Abuse and Mental Health Service Administration. Results from the 2012 National Survey on Drug Use and Health: Summary of National Findings and Detailed Tables. Rockville, MD: Substance Abuse and Mental Health Services Administration; 2013. www.samhsa.gov/data/sites/default/files/NSDUHresults2012/NSDUHresults2012.pdf. Accessed April 20, 2015.
5. Why does adult African-American smoking prevalence in California remain higher than for non-Hispanic whites?;Trinidad;Ethn Dis,2005