1. . 1998. Regression Analysis of Count Data. Cambridge University Press: Cambridge.
2. Center on Alcohol Marketing and Youth. 2002. Overexposed: Youth a Target of Alcohol Advertising in Magazines. CAMY, Washington, DC. Available from URL: http://camy.org/research/mag0902.
3. Center on Alcohol Marketing and Youth. 2005. Youth Overexposed: Alcohol Advertising in Magazines, 2001 to 2003. CAMY, Washington, DC. Available from URL: http://camy.org/research/mag0405/.
4. Federal Trade Commission. 1999. Self-Regulation in the Alcohol Industry: A Review of Industry Efforts to Avoid Promoting Alcohol to Underage Consumers – A Report to Congress. FTC, Washington, DC. Available from URL: http://www.ftc.gov/reports/alcohol/alcoholreport.htm.