APA (7th ed.) Citation

Guelzo, A. C. (2013). Gettysburg: The last invasion (First edition.). Alfred A. Knopf.

Chicago Style (17th ed.) Citation

Guelzo, Allen C. Gettysburg: The Last Invasion. First edition. New York: Alfred A. Knopf, 2013.

MLA (8th ed.) Citation

Guelzo, Allen C. Gettysburg: The Last Invasion. First edition. Alfred A. Knopf, 2013.

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