APA

Stead Philip John,, . (1977). Pioneers in policing. New Jersey: Patterson Smith Publishing Co.

Chicago

Stead Philip John,, . 1977. Pioneers in policing. New Jersey: Patterson Smith Publishing Co.

Harvard

Stead Philip John,, . (1977). Pioneers in policing. New Jersey: Patterson Smith Publishing Co.

MLA

Stead Philip John,, . Pioneers in policing. New Jersey: Patterson Smith Publishing Co. 1977.