Joint Study Group of the International Federation of Gynaecology and Obstetrics and the International Confederation of Midwives. (1976). Maternity care in the world: International survey of midwifery practice and training (2nd ed.). International Federation of Gynaecology and Obstetrics.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रJoint Study Group of the International Federation of Gynaecology and Obstetrics and the International Confederation of Midwives. Maternity Care in the World: International Survey of Midwifery Practice and Training. 2nd ed. [s.l.]: International Federation of Gynaecology and Obstetrics, 1976.
एमएलए (9वां संस्करण) प्रशस्ति पत्रJoint Study Group of the International Federation of Gynaecology and Obstetrics and the International Confederation of Midwives. Maternity Care in the World: International Survey of Midwifery Practice and Training. 2nd ed. International Federation of Gynaecology and Obstetrics, 1976.