Carr, A. F. (1952). Handbook of turtles: The turtles of the United States, Canada, and Baja California. Comstock Pub. Associates.
Chicago-referens (17:e uppl.)Carr, Archie Fairly. Handbook of Turtles: The Turtles of the United States, Canada, and Baja California. Ithaca, N.Y: Comstock Pub. Associates, 1952.
MLA-referens (9:e uppl.)Carr, Archie Fairly. Handbook of Turtles: The Turtles of the United States, Canada, and Baja California. Comstock Pub. Associates, 1952.
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