Backett, E. M., Davies, A. M., & Petros-Barvazian, A. (1984). The risk approach in health care: With special reference to maternal and child health, including family planning. World Health Organization ; WHO Publications Centre USA [distributor].
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Backett, E. Maurice, A. Michael Davies, و Angèle Petros-Barvazian. The Risk Approach in Health Care: With Special Reference to Maternal and Child Health, Including Family Planning. Geneva : Albany, NY: World Health Organization ; WHO Publications Centre USA [distributor], 1984.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Backett, E. Maurice, et al. The Risk Approach in Health Care: With Special Reference to Maternal and Child Health, Including Family Planning. World Health Organization ; WHO Publications Centre USA [distributor], 1984.