Stanford، Joseph B.؛ Smith، KEN R. (2013). "Marital Fertility and Income: Moderating Effects of the Church of Jesus Christ of Latter-Day Saints Religion in Utah". Journal of Biosocial Science. ج. 45 ع. 2: 239–48. DOI:10.1017/S002193201200065X. PMID:23069479.
Stanford، Joseph B.؛ Smith، KEN R. (2013). "Marital Fertility and Income: Moderating Effects of the Church of Jesus Christ of Latter-Day Saints Religion in Utah". Journal of Biosocial Science. ج. 45 ع. 2: 239–48. DOI:10.1017/S002193201200065X. PMID:23069479.
UNFPA: Population and poverty. Achieving equity, equality and sustainability. Population and development series no. 8, 2003. "نسخة مؤرشفة"(PDF). مؤرشف من الأصل(PDF) في 2013-04-21. اطلع عليه بتاريخ 2023-04-20.
"Ethiopia"(PDF). A Country Status Report on Health and Poverty (In Two Volumes) the World Bank Group Africa Region Human Development & Ministry of Health, Ethiopia. II: Main Report. يوليو 2005. مؤرشف من الأصل(PDF) في 2022-12-17.
UNFPA: Population and poverty. Achieving equity, equality and sustainability. Population and development series no. 8, 2003. "نسخة مؤرشفة"(PDF). مؤرشف من الأصل(PDF) في 2013-04-21. اطلع عليه بتاريخ 2023-04-20.
"Ethiopia"(PDF). A Country Status Report on Health and Poverty (In Two Volumes) the World Bank Group Africa Region Human Development & Ministry of Health, Ethiopia. II: Main Report. يوليو 2005. مؤرشف من الأصل(PDF) في 2022-12-17.