Bechtel, H. Bernard. Reptile and Amphibian Variants: Colors, Patterns, and Scales. Malabar, Fla.: Krieger Pub., 1995. Print.
Burgess, Kaile. "Lithobates Pipiens: Northern Leopard Frog." Middlebury College: Community Home Page. The Vermont Reptile and Amphibian Atlas Project, 22 Apr. 2010. Web. 10 Apr. 2010. .
Dickerson, Mary Cynthia. Frog Book. New York: Doubleday, 1908. Print.
Graham, Donna. "Northern Leopard Frog." Northern State University. South Dakota Department of Game, Fish and Parks, Division of Wildlife, Pierre, SD., 1997. Web. 18 Apr. 2010. .
Halliday, Tim, and Kraig Adler. The Encyclopedia of Reptiles and Amphibians. New York, N.Y.: Facts on File, 1986. Print.
"Heron." Wikipedia, the Free Encyclopedia. 14 Apr. 2010. Web. 7 Apr. 2010. .
Hofrichter, Robert. Amphibians: the World of Frogs, Toads, Salamanders and Newts. Buffalo, N.Y.: Firefly, 2000. Print.
Huybrechts, Catherine. "The Biogeography of Pacific Tree Frog." Department of Geography and Human Environmental Studies, San Francisco State University. San Francisco State University Department of Geography, Fall 2001. Web. 10 Apr. 2010. .
Lannoo, Michael J. Amphibian Declines: the Conservation Status of United States Species. Berkeley: University of California, 2005. Print.
"Northern Leopard Frog." Fish and Wildlife Service. The Cleveland Museum of Natural History, 2010. Web. 10 Apr. 2010. .
"Pesticide." Wikipedia, the Free Encyclopedia. 21 Apr. 2010. Web. 22 Apr. 2010. .
"Rana Pipiens - Northern Leopard Frog." California Herps. 2001. Web. 9 Apr. 2010. .
Rorabaugh, James C. "Rana Pipiens." AmphibiaWeb. 2010. Web. 9 Apr. 2010. .
"Vermont State Amphibian, Northern Leopard Frog, (Rana Pipiens) from NETSTATE.COM." 50 States - Capitals, Maps, Geography, State Symbols, State Facts, Songs, History, Famous People from NETSTATE.COM. NSTATE, LLC., 21 Apr. 1998. Web. 10 Apr. 2010. .
Wright, Anna Allen, and Albert Hazen Wright. Handbook of Frogs and Toads; the Frogs and Toads of the United States and Canada,. Ithaca, N.Y.: Comstock Pub., 1933. Print.
"Zion National Park - Amphibians (U.S. National Park Service)." U.S. National Park Service - Experience Your America. 11 Jan. 2010. Web. 5 Apr. 2010.

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