APA (7th ed.) Citation

Watson, L., & Ritchie, T. L. (1985). Whales of the world (Rev. paperback ed.). Hutchinson.

Chicago Style (17th ed.) Citation

Watson, Lyall, and Thomas L. Ritchie. Whales of the World. Rev. paperback ed. London: Hutchinson, 1985.

MLA (8th ed.) Citation

Watson, Lyall, and Thomas L. Ritchie. Whales of the World. Rev. paperback ed. Hutchinson, 1985.