Ernst, C. H., Barbour, R. W. 1., & Lovich, J. E. (1994). Turtles of the United States and Canada. Washington: Smithsonian Institution Press.
Chicago Style CitationErnst, Carl H., Róger W. 1919- Barbour, and Jeffrey E. Lovich. Turtles of the United States and Canada. Washington: Smithsonian Institution Press, 1994.
MLA CitationErnst, Carl H., Róger W. 1919- Barbour, and Jeffrey E. Lovich. Turtles of the United States and Canada. Washington: Smithsonian Institution Press, 1994.
Warning: These citations may not always be 100% accurate.