Παραπομπή σε μορφή APA (7η εκδ.)

Alkema, L., & Chou, D. (2014). Trends in maternal mortality: 1990 to 2013. estimates by WHO, UNICEF, UNFPA, The World Bank and the United Nations Population Division. World Health Organization.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Alkema, Leontine, και Doris Chou. Trends in Maternal Mortality: 1990 to 2013. Estimates by WHO, UNICEF, UNFPA, The World Bank and the United Nations Population Division. Geveva, Switzerland: World Health Organization, 2014.

Παραπομπή σε μορφή MLA (8th εκδ.)

Alkema, Leontine, και Doris Chou. Trends in Maternal Mortality: 1990 to 2013. Estimates by WHO, UNICEF, UNFPA, The World Bank and the United Nations Population Division. World Health Organization, 2014.