1. Cellular Telecommunications and Internet Association, 2008. Annualized wireless industry survey results, June 1985 to June 2008, Washington, DC. Available at: http://files.ctia.org/pdf/CTIA_Survey_Mid-Year_2008_Graphics.pdf.
2. Enhancing the effectiveness of graduated driver licensing legislation;Foss;Journal of Safety Research,2003
3. Graduated driver licensing restrictions: awareness, compliance, and enforcement in North Carolina;Goodwin;Journal of Safety Research,2004
4. Encouraging compliance with graduated driver licensing restrictions;Goodwin;Journal of Safety Research,2006
5. Insurance Institute for Highway Safety, 2008. Cell Phone Laws, Arlington, VA. Available at: www.iihs.org/laws/state_laws/cell_phones.html (accessed: November, 4, 2008).