APA (7th ed.) Citation

Haskell, F. A. (2010). The Battle of Gettysburg. Project Gutenberg.

Chicago Style (17th ed.) Citation

Haskell, Frank Aretas. The Battle of Gettysburg. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Haskell, Frank Aretas. The Battle of Gettysburg. Project Gutenberg, 2010.

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