APA
Jefferson T. A., Pitman R. L. & Webber M. A. (2008). Marine mammals of the world : a comprehensive guide to their identification. Amsterdam ; Boston: Elsevier / Academic Press.
Chicago
Jefferson Thomas A, Pitman Robert L and Webber Marc A. 2008. Marine mammals of the world : a comprehensive guide to their identification. Amsterdam ; Boston: Elsevier / Academic Press.
Harvard
Jefferson T. A., Pitman R. L. and Webber M. A. (2008). Marine mammals of the world : a comprehensive guide to their identification. Amsterdam ; Boston: Elsevier / Academic Press.
MLA
Jefferson Thomas A, Pitman Robert L and Webber Marc A. Marine mammals of the world : a comprehensive guide to their identification. Amsterdam ; Boston: Elsevier / Academic Press. 2008.