APA (7th ed.) Citation

Levy, T. A. (2011). Lincoln, the Politician. Project Gutenberg.

Chicago Style (17th ed.) Citation

Levy, T. Aaron. Lincoln, the Politician. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Levy, T. Aaron. Lincoln, the Politician. Project Gutenberg, 2011.

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