APA (7th ed.) Citation

Perkins, R. M. (1942). Elements of police science. Foundation Press, inc..

Chicago Style (17th ed.) Citation

Perkins, Rollin Morris. Elements of Police Science. Chicago: Foundation Press, inc., 1942.

MLA (9th ed.) Citation

Perkins, Rollin Morris. Elements of Police Science. Foundation Press, inc., 1942.