APA (7th ed.) Citation

(2006). The Battle of Gettysburg. World Almanac Library.

Chicago Style (17th ed.) Citation

The Battle of Gettysburg. USA: World Almanac Library, 2006.

MLA (9th ed.) Citation

The Battle of Gettysburg. World Almanac Library, 2006.

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