MLA

Bryan, M. A, and A. N Tucker. Distribution of the Nilotic and Nilo-hamitic Languages of Africa. London: Oxford university press, 1948.

APA

Bryan, M. A, & Tucker, A. N. (1948). Distribution of the Nilotic and Nilo-hamitic languages of Africa. London: Oxford university press.

Chicago

Bryan, M. A., and A. N Tucker. Distribution of the Nilotic and Nilo-Hamitic Languages of Africa. London: Oxford university press, 1948.