APA (7th ed.) Citation

Bovill, E. W. (1968). The Niger explored. Oxford U.P..

Chicago Style (17th ed.) Citation

Bovill, E. W. The Niger Explored. London, New York [etc.]: Oxford U.P., 1968.

MLA (8th ed.) Citation

Bovill, E. W. The Niger Explored. Oxford U.P., 1968.