Hofrichter, R. (2000). Amphibians: The world of frogs, toads, salamanders and newts. Firefly Books.
Cita Chicago Style (17a ed.)Hofrichter, Robert. Amphibians: The World of Frogs, Toads, Salamanders and Newts. Buffalo, N.Y.: Firefly Books, 2000.
Cita MLA (8a ed.)Hofrichter, Robert. Amphibians: The World of Frogs, Toads, Salamanders and Newts. Firefly Books, 2000.
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