Cita APA (7a ed.)

Davis, O. j. (1971). Nigeria ([Bd.] 6.). American Book.

Cita Chicago Style (17a ed.)

Davis, O.L. junior. Nigeria. [Bd.] 6. New York [u.a.]: American Book, 1971.

Cita MLA (9a ed.)

Davis, O.L. junior. Nigeria. [Bd.] 6. American Book, 1971.