APA (7th ed.) Citation

Smith, H. M. (2011). Hybridization Between Two Species of Garter Snakes. Project Gutenberg.

Chicago Style (17th ed.) Citation

Smith, Hobart M. Hybridization Between Two Species of Garter Snakes. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Smith, Hobart M. Hybridization Between Two Species of Garter Snakes. Project Gutenberg, 2011.

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