Snead, J., Downing, M., Lorvick, J., Garcia, B., Thawley, R., Kegeles, S., & Edlin, B. R. (2003). Secondary syringe exchange among injection drug users. Springer-Verlag.

Snead, Judith, Moher Downing, Jennifer Lorvick, Barbara Garcia, Robert Thawley, Susan Kegeles, و Brian R. Edlin. Secondary Syringe Exchange Among Injection Drug Users. Springer-Verlag, 2003.

Snead, Judith, et al. Secondary Syringe Exchange Among Injection Drug Users. Springer-Verlag, 2003.