APA (7th ed.) Citation

Holden, H. M. (2008). FBI 100 years: An unofficial history. Zenith Press Publishers.

Chicago Style (17th ed.) Citation

Holden, Henry M. FBI 100 Years: An Unofficial History. United States: Zenith Press Publishers, 2008.

MLA (9th ed.) Citation

Holden, Henry M. FBI 100 Years: An Unofficial History. Zenith Press Publishers, 2008.

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