Cita APA (7a ed.)

Oboli, H. O. N., & Church, R. J. H. (1975). An outline geography of West Africa (7. ed., rev.). Harrap.

Cita Chicago Style (17a ed.)

Oboli, H. O. N., y Ronald J. Harrison Church. An Outline Geography of West Africa. 7. ed., rev. London: Harrap, 1975.

Cita MLA (9a ed.)

Oboli, H. O. N., y Ronald J. Harrison Church. An Outline Geography of West Africa. 7. ed., rev. Harrap, 1975.