APA (7th ed.) Citation

Markle, D. E. (2004). Spies and spymasters of the Civil War (Rev. & expanded ed.). Hippocrene Books.

Chicago Style (17th ed.) Citation

Markle, Donald E. Spies and Spymasters of the Civil War. Rev. & expanded ed. New York: Hippocrene Books, 2004.

MLA (9th ed.) Citation

Markle, Donald E. Spies and Spymasters of the Civil War. Rev. & expanded ed. Hippocrene Books, 2004.