APA (7th ed.) Citation

Markle. (2000). Spies and spymasters of the Civil War (Rev. ed.). Hippocrene Books.

Chicago Style (17th ed.) Citation

Markle. Spies and Spymasters of the Civil War. Rev. ed. New York: Hippocrene Books, 2000.

MLA (8th ed.) Citation

Markle. Spies and Spymasters of the Civil War. Rev. ed. Hippocrene Books, 2000.