APA (7th ed.) Citation

Flinn, J. J., & Wilkie, J. E. (1971). History of the Chicago police Police in America.

Chicago Style (17th ed.) Citation

Flinn, John J., and John E. Wilkie. "History of the Chicago Police." Police in America 1971.

MLA (9th ed.) Citation

Flinn, John J., and John E. Wilkie. "History of the Chicago Police." Police in America, 1971.