Cita APA

Gaffney, E. S., & Gaffney, E. S. (1975). A Phylogeny and classification of the higher categories of turtles. New York, New York: American Museum of Natural History.

Citación estilo Chicago

Gaffney, Eugene S., y Eugene S. Gaffney. A Phylogeny and Classification of the Higher Categories of Turtles. New York, New York: American Museum of Natural History, 1975.

Cita MLA

Gaffney, Eugene S., y Eugene S. Gaffney. A Phylogeny and Classification of the Higher Categories of Turtles. New York, New York: American Museum of Natural History, 1975.