World Health Organization. Pregnancy, childbirth, postpartum and newborn care: A guide for essential practice.
Citación estilo ChicagoWorld Health Organization. Pregnancy, Childbirth, Postpartum and Newborn Care: A Guide for Essential Practice.
Cita MLAWorld Health Organization. Pregnancy, Childbirth, Postpartum and Newborn Care: A Guide for Essential Practice.
Warning: These citations may not always be 100% accurate.