APA (7th ed.) Citation

Fox, R. C. (2009). Two New Pelycosaurs from the Lower Permian of Oklahoma. Project Gutenberg.

Chicago Style (17th ed.) Citation

Fox, Richard C. Two New Pelycosaurs from the Lower Permian of Oklahoma. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Fox, Richard C. Two New Pelycosaurs from the Lower Permian of Oklahoma. Project Gutenberg, 2009.

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