ebrary, Inc, & Schulenberg, T. S. (2007). Birds of Peru. Princeton University Press.
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Dyfyniad Arddull Chicago
ebrary, Inc, and Thomas S. Schulenberg. Birds of Peru. Princeton: Princeton University Press, 2007.
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Dyfyniad MLA
ebrary, Inc, and Thomas S. Schulenberg. Birds of Peru. Princeton University Press, 2007.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.