Crampin, A. C., Lamagni, T. L., Hope, V. D., Newham, J. A., Lewis, K. M., Parry, J. V., & Gill, O. N. (1998). The risk of infection with HIV and hepatitis B in individuals who inject steroids in England and Wales. Cambridge University Press.

Crampin, A. C., T. L. Lamagni, V. D. Hope, J. A. Newham, K. M. Lewis, J. V. Parry, ja O. N. Gill. The Risk of Infection With HIV and Hepatitis B in Individuals Who Inject Steroids in England and Wales. Cambridge University Press, 1998.

Crampin, A. C., et al. The Risk of Infection With HIV and Hepatitis B in Individuals Who Inject Steroids in England and Wales. Cambridge University Press, 1998.