Forde, D. 1951. The Yoruba-speaking Peoples of Southwestern Nigeria. (Ethnographic survey of Africa, Western Africa, 4.) London: International African Inst. (IAI).
@book{forde1951, address = {London}, author = {Forde, D.}, key = {Forde (1951)}, publisher = {London: International African Inst. (IAI)}, series = {Ethnographic survey of Africa, Western Africa}, title = {The Yoruba-speaking Peoples of Southwestern Nigeria}, volume = {4}, year = {1951} }