Παραπομπή σε μορφή APA (7η εκδ.)

(1967). The world and its peoples: Africa North and East. Greystone Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

The World and Its Peoples: Africa North and East. New York: Greystone Press, 1967.

Παραπομπή σε μορφή MLA (8th εκδ.)

The World and Its Peoples: Africa North and East. Greystone Press, 1967.