Dyfyniad APA

Pough, F. H., Heiser, J. B., & Janis, C. M. (2009). Vertebrate life (Eighth edition.). Benjamin Cummings.

Dyfyniad Arddull Chicago

Pough, F. Harvey, John B. Heiser, and Christine M. Janis. Vertebrate Life. Eighth edition. San Francisco: Benjamin Cummings, 2009.

Dyfyniad MLA

Pough, F. Harvey, et al. Vertebrate Life. Eighth edition. Benjamin Cummings, 2009.

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