(EN) Fish and Aquatic News, su aquaticcommunity.com. URL consultato il 9 giugno 2010.
bucknell.edu
departments.bucknell.edu
(EN) D.E. Wilson e D.M. Reeder, Trichechus, in Mammal Species of the World. A Taxonomic and Geographic Reference, 3ยช ed., Johns Hopkins University Press, 2005, ISBN0-8018-8221-4.