Citace podle APA (7th ed.)
Helgen, J. C. (2012). Peril in the ponds: Deformed frogs, politics, and a biologist's quest. University of Massachusetts Press.
Citace podle Chicago (17th ed.)
Helgen, Judith Cairncross. Peril in the Ponds: Deformed Frogs, Politics, and a Biologist's Quest. Amherst, [Massachusetts] ; Boston, [Massachusetts]: University of Massachusetts Press, 2012.
Citace podle MLA (9th ed.)
Helgen, Judith Cairncross. Peril in the Ponds: Deformed Frogs, Politics, and a Biologist's Quest. University of Massachusetts Press, 2012.
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