REFERENCES

Agresti, A. (2002). Categorical Data Analyses. John Wiley & Sons: Hoboken, NJ.

Solomon, Mark G., Ulmer, Robert G., Preusser, David F. (2002). Evaluation of Click It or Ticket Model Programs. U.S. Department of Transportation, National Highway Traffic Safety Administration DOT HS 809 498. Washington, DC.

SPSS (2004). SPSS Advanced Statistics 13.0, SPSS Inc.: Chicago, IL.