APA (7th ed.) Citation

Gilbert, D. A. (1987). Regional geography of West Africa (New ed.). Macmillan.

Chicago Style (17th ed.) Citation

Gilbert, D. A. Regional Geography of West Africa. New ed. London u.a: Macmillan, 1987.

MLA (9th ed.) Citation

Gilbert, D. A. Regional Geography of West Africa. New ed. Macmillan, 1987.