APA (7th ed.) Citation

Ridgway, S. H., & Harrison, R. J. (1981). Handbook of marine mammals. V. 2: Seals. Academic Press.

Chicago Style (17th ed.) Citation

Ridgway, Sam H., and Richard John Harrison. Handbook of Marine Mammals. V. 2: Seals. London: Academic Press, 1981.

MLA (9th ed.) Citation

Ridgway, Sam H., and Richard John Harrison. Handbook of Marine Mammals. V. 2: Seals. Academic Press, 1981.