APA (7th ed.) Citation

Lehmann, U. (1981). The ammonites: Their life and their world. Cambridge University Press.

Chicago Style (17th ed.) Citation

Lehmann, Ulrich. The Ammonites: Their Life and Their World. Cambridge [Eng.] ; New York: Cambridge University Press, 1981.

MLA (8th ed.) Citation

Lehmann, Ulrich. The Ammonites: Their Life and Their World. Cambridge University Press, 1981.