APA (7th ed.) Citation

Mason, C. F., & Macdonald, S. M. (1986). Otters: Ecology and conservation. Cambridge University Press.

Chicago Style (17th ed.) Citation

Mason, C. F., and S. M. Macdonald. Otters: Ecology and Conservation. Cambridge [Cambridgeshire] ; New York: Cambridge University Press, 1986.

MLA (9th ed.) Citation

Mason, C. F., and S. M. Macdonald. Otters: Ecology and Conservation. Cambridge University Press, 1986.