APA (7th ed.) Citation

Sparks, B. W., & West, R. G. (1981). The Ice Age in Britain. Methuen.

Chicago Style (17th ed.) Citation

Sparks, B. W., and R. G. West. The Ice Age in Britain. London ; New York: Methuen, 1981.

MLA (9th ed.) Citation

Sparks, B. W., and R. G. West. The Ice Age in Britain. Methuen, 1981.