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Keefer, Edward C. (1973). »Great Britain and Ethiopia 1897–1910: Competition for Empire«. International Journal of African Studies. 6 (3): 468–74. doi:10.2307/216612. JSTOR216612.
Zarins, Juris (1990). »Early Pastoral Nomadism and the Settlement of Lower Mesopotamia«. Bulletin of the American Schools of Oriental Research. 280 (280): 31–65. doi:10.2307/1357309. JSTOR1357309. S2CID163491760.
United Nations Statistics Division, Millennium Development Goals indicators: Carbon dioxide emissions (CO2), thousand tonnes of CO2 (collected by CDIAC) Human-produced, direct emissions of carbon dioxide only. Excludes other greenhouse gases; land use, land-use change, and forestry (LULUCF); and natural background flows of CO2 (See also: Carbon cycle)
undp.org
hdr.undp.org
»Human Development Report 2023/24«(PDF) (v angleščini). United Nations Development Programme. 13. marec 2024. Pridobljeno 13. marca 2024.
»Country Level«. 2007 Population and Housing Census of Ethiopia. Osrednja statistična agencija. 13. julij 2010. Arhivirano iz prvotnega spletišča dne 13. novembra 2012. Pridobljeno 18. januarja 2013.