APA-referens (7:e uppl.)

Darby, S., Ewart, D., Giangrande, P., Spooner, R., & Rizza, C. (1996). Importance of age at infection with HIV-1 for survival and development of AIDS in UK haemophilia population.

Chicago-referens (17:e uppl.)

Darby, S., D. Ewart, P. Giangrande, R. Spooner, och C. Rizza. Importance of Age at Infection with HIV-1 for Survival and Development of AIDS in UK Haemophilia Population. 1996.

MLA-referens (9:e uppl.)

Darby, S., et al. Importance of Age at Infection with HIV-1 for Survival and Development of AIDS in UK Haemophilia Population. 1996.