APA (7th ed.) Citation

Leonard, A. G. (1968). The lower Niger and its tribes (New impr.). Cass.

Chicago Style (17th ed.) Citation

Leonard, Arthur G. The Lower Niger and Its Tribes. New impr. London: Cass, 1968.

MLA (9th ed.) Citation

Leonard, Arthur G. The Lower Niger and Its Tribes. New impr. Cass, 1968.