APA (7th ed.) Citation

Griffin, W. E. B., & Butterworth, W. E. (2012). The spymasters. G. P. Putnam's Sons.

Chicago Style (17th ed.) Citation

Griffin, W. E. B., and William E. Butterworth. The Spymasters. New York: G. P. Putnam's Sons, 2012.

MLA (8th ed.) Citation

Griffin, W. E. B., and William E. Butterworth. The Spymasters. G. P. Putnam's Sons, 2012.

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