Cita APA (7a ed.)

Jefferson, T. A., Webber, M. A., Pitman, R. L., & Jarrett, B. (2008). Marine mammals of the world: A comprehensive guide to their identification. Elsevier.

Cita Chicago Style (17a ed.)

Jefferson, Thomas A., Marc A. Webber, Robert L. Pitman, y Brett Jarrett. Marine Mammals of the World: A Comprehensive Guide to Their Identification. Amsterdam: Elsevier, 2008.

Cita MLA (9a ed.)

Jefferson, Thomas A., et al. Marine Mammals of the World: A Comprehensive Guide to Their Identification. Elsevier, 2008.