APA (7th ed.) Citation

Duffin, A. T. (2010). History in blue: 160 years of women police, sheriffs, detectives, and state troopers. Kaplan Pub..

Chicago Style (17th ed.) Citation

Duffin, Allan T. History in Blue: 160 Years of Women Police, Sheriffs, Detectives, and State Troopers. New York: Kaplan Pub., 2010.

MLA (8th ed.) Citation

Duffin, Allan T. History in Blue: 160 Years of Women Police, Sheriffs, Detectives, and State Troopers. Kaplan Pub., 2010.