Darby, S., Rizza, C., Doll, R., Spooner, R., Stratton, I., & Thakrar, B. (1989). Incidence of AIDS and excess of mortality associated with HIV in haemophiliacs in the United Kingdom: Report on behalf of the directors of haemophilia centres in the United Kingdom.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Darby, S., C. Rizza, R. Doll, R. Spooner, I. Stratton, و B. Thakrar. Incidence of AIDS and Excess of Mortality Associated with HIV in Haemophiliacs in the United Kingdom: Report on Behalf of the Directors of Haemophilia Centres in the United Kingdom. 1989.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Darby, S., et al. Incidence of AIDS and Excess of Mortality Associated with HIV in Haemophiliacs in the United Kingdom: Report on Behalf of the Directors of Haemophilia Centres in the United Kingdom. 1989.