Coorts, J., Michael, T., Whitehill, W., & Winborn, J. (1997). Hepatitis B immunization of athletic trainers in NATA district IX. Journal of athletic training, 32(4), S. 315-319. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1320347/pdf/jathtrain00016-0029.pdf

Coorts, J.W., T.J Michael, W.R Whitehill, and J.D Winborn. "Hepatitis B Immunization of Athletic Trainers in NATA District IX." Journal of Athletic Training 32, no. 4 (1997): S. 315-319.

Coorts, J.W., T.J Michael, W.R Whitehill, and J.D Winborn. "Hepatitis B Immunization of Athletic Trainers in NATA District IX." Journal of Athletic Training 32.4 (1997): S. 315-319.