World Health Organization. Pregnancy, childbirth, postpartum and newborn care: A guide for essential practice.
Chicago-viite (17. p.)World Health Organization. Pregnancy, Childbirth, Postpartum and Newborn Care: A Guide for Essential Practice.
MLA-viite (8. p.)World Health Organization. Pregnancy, Childbirth, Postpartum and Newborn Care: A Guide for Essential Practice.
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