1. CDC MMWR. Youth tobacco surveillance—United States, 1998–1999. Available at: www.cdc.gov/mmwr/preveiw/. Accessed October, 13, 2000.
2. Public Health;Turnok,2000
3. Growing up tobacco free,1994
4. Monitoring the Future national survey results on drug use, 1975–2003;Johnston;Volume I,2004
5. Social influences on health-risk behaviors among minority middle school students;Beal;J Adolesc Health,2001