APA Style

Organization, W, H. (1991). Essential elements of obstetric care at first referral level . Geneva: Published on behalf of the UNDP/World Bank/WHO Special Programme for Research and Training in Tropic.

MLA Style

Organization, World, Health. "Essential elements of obstetric care at first referral level". Geneva: Published on behalf of the UNDP/World Bank/WHO Special Programme for Research and Training in Tropic, 1991. Text.