APA
Armstrong R. G., University Institute of African Studies, . (1964). The study of West African languages. Ibadan: Ibadan University Press.
Chicago
Armstrong Robert G, University Institute of African Studies, . 1964. The study of West African languages. Ibadan: Ibadan University Press.
Harvard
Armstrong R. G., University Institute of African Studies, . (1964). The study of West African languages. Ibadan: Ibadan University Press.
MLA
Armstrong Robert G, University Institute of African Studies, . The study of West African languages. Ibadan: Ibadan University Press. 1964.