APA (7th ed.) Citation

Purves, P. E., & Pilleri, G. E. (1983). Echolocation in whales and dolphins. Academic Press.

Chicago Style (17th ed.) Citation

Purves, P. E., and G. E. Pilleri. Echolocation in Whales and Dolphins. London: Academic Press, 1983.

MLA (9th ed.) Citation

Purves, P. E., and G. E. Pilleri. Echolocation in Whales and Dolphins. Academic Press, 1983.