Cita APA (7a ed.)

Clayton, R., & Flax, Z. (1971). Central and East Africa (1., american ed.). Day.

Cita Chicago Style (17a ed.)

Clayton, Robert, y Zena Flax. Central and East Africa. 1., american ed. New York: Day, 1971.

Cita MLA (9a ed.)

Clayton, Robert, y Zena Flax. Central and East Africa. 1., american ed. Day, 1971.