Atkinson, Ronald (July 2000). "Africa, Asia, and Latin America". Annals of the American Academy of Political and Social Science. 570: 192–193. doi:10.1177/0002716200570001019.
MacEachern, Scott (2003). "HISTORICAL LINGUISTICS AND AFRICAN HISTORY the Civilizations of Africa: A History to 1800. By CHRISTOPHER EHRET. Charlottesville: University Press of Virginia; Oxford: James Currey 2002. Pp. Xii+480. $50 (ISBN 0-8139-2084-1); $22.50; £18.95, paperback (ISBN 0-85255-475-3)". Journal of African History. 44 (2): 342–343. doi:10.1017/s0021853703228553. S2CID162352245.
MacEachern, Scott (2003). "HISTORICAL LINGUISTICS AND AFRICAN HISTORY the Civilizations of Africa: A History to 1800. By CHRISTOPHER EHRET. Charlottesville: University Press of Virginia; Oxford: James Currey 2002. Pp. Xii+480. $50 (ISBN 0-8139-2084-1); $22.50; £18.95, paperback (ISBN 0-85255-475-3)". Journal of African History. 44 (2): 342–343. doi:10.1017/s0021853703228553. S2CID162352245.