APA (7th ed.) Citation

Wellman, J. (2011). A Revision of Snakes of the Genus Conophis (Family Colubridae, from Middle America). Project Gutenberg.

Chicago Style (17th ed.) Citation

Wellman, John. A Revision of Snakes of the Genus Conophis (Family Colubridae, from Middle America). Project Gutenberg, 2011.

MLA (9th ed.) Citation

Wellman, John. A Revision of Snakes of the Genus Conophis (Family Colubridae, from Middle America). Project Gutenberg, 2011.

Warning: These citations may not always be 100% accurate.