Tham khảo Rái_cá

Tham khảo Rái_cá_biển

Heptner, V. G.; Sludskii, A. A. (2002). Mammals of the Soviet Union. Vol. II, part 1b, Carnivores (Mustelidae and Procyonidae). Washington, D.C.: Smithsonian Institution Libraries and National Science Foundation. ISBN 90-04-08876-8.
Kenyon, Karl W. (1969). The Sea Otter in the Eastern Pacific Ocean. Washington, D.C.: U.S. Bureau of Sport Fisheries and Wildlife. ISBN 0-486-21346-3.
Love, John A. (1992). Sea Otters. Golden, Colorado: Fulcrum Publishing. ISBN 1-55591-123-4. OCLC 25747993.
Nickerson, Roy (1989). Sea Otters, a Natural History and Guide. San Francisco, CA: Chronicle Books. ISBN 0-87701-567-8. OCLC 18414247.
Silverstein, Alvin; Silverstein, Virginia and Robert (1995). The Sea Otter. Brookfield, Connecticut: The Millbrook Press, Inc. ISBN 1-56294-418-5. OCLC 30436543. Chú thích sử dụng tham số |coauthors= bị phản đối (trợ giúp)
Middleton, John (2001). Maritime Activities And Their Perception Today. California Academy of Science lecture. Đã bỏ qua tham số không rõ |unused_data= (trợ giúp)
Farris, Glenn (2007). Mains'l Haul, a Journal of Pacific Maritime History, Vol 43. San Diego, California: Maritime Museum of San Diego. ISSN 1540-3386.
Mathes, Michael (2008). The Russian-Mexican Frontier. Jenner, California: Fort Ross Interpretive Association, Inc. ISBN 978-1-60643-951-7.
VanBlaricom, Glenn R. (2001). Sea Otters. Stillwater, MN: Voyageur Press Inc. ISBN 0-89658-562-X. OCLC 46393741.

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