APA (7th ed.) Citation

O'Connor, J., & Mantha, J. (2013). What was the Battle of Gettysburg? Grosset & Dunlap.

Chicago Style (17th ed.) Citation

O'Connor, Jim, and John Mantha. What Was the Battle of Gettysburg? New York: Grosset & Dunlap, 2013.

MLA (8th ed.) Citation

O'Connor, Jim, and John Mantha. What Was the Battle of Gettysburg? Grosset & Dunlap, 2013.

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