APA (7th ed.) Citation

Morgan, T. H. (2009). A Critique of the Theory of Evolution. Project Gutenberg.

Chicago Style (17th ed.) Citation

Morgan, Thomas Hunt. A Critique of the Theory of Evolution. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Morgan, Thomas Hunt. A Critique of the Theory of Evolution. Project Gutenberg, 2009.

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