1. Healthy people 2010;US Department of Health and Human Services,2000
2. US Department of Health and Human Services, National Center for Health Statistics. National Health Interview Surveys, 1998–2005 [computer files and documentation]. Hyattsville, MD: US Department of Health and Human Services, National Center for Health Statistics [producer]. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor].
3. US Department of Health and Human Services, Substance Abuse and Mental Health Services Administration, Office of Applied Studies. National Survey on Drug Use and Health, 1998–2005 [computer files and documentation]. ICPSR version. Research Triangle Park, NC: Research Triangle Institute [producer]. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor].
4. Tobacco use among adults – United States, 2005;Centers for Disease Control and Prevention;MMWR,2006