Authority

Sharks Authority

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MLA Seitz, Jason. ufl.edu. FLMNH. 29 August 2011

This site is authoritative because it is the website of a shark research center. The publisher is also the webmaster of the site. The author does not state any credentials on the website but by doing some research I found that he is a biologist. The publisher does not try to sell anything on this site. Last the publisher is a professional research center.