ETHNONYM: Yakurr (the official Nigerian spelling)
Cook, T. L. (1969). Benue-Congo Newsletter 6 (December). Cyclostyled.
Forde, Daryll (1951). Marriage and the Family among the Yakö in South-eastern Nigeria. London: Percy Lund Humphries & Co. for the International African Institute.
Forde, Daryll (1962). "Death and Succession: An Analysis of Yakö Mortuary Ritual." In Essays on the Ritual of Social Relations, edited by Max Gluckman. Manchester: Manchester University Press.
Forde, Daryll (1964). Yakö Studies. London, New York, and Ibadan: Oxford University Press for the International African Institute.
Greenberg, Joseph H. (1963). The Languages of Africa. Indiana University Research Center in Anthropology, Folklore, and Linguistics, Publication no. 25. The Hague: Mouton.
Harris, Rosemary (1957). Field notes.
Partridge, Charles (1905). Cross River Natives. London: Hutchinson & Co.