Cita APA (7th ed.)

Sterling, J. W. (1972). Changes in role concepts of police officers. International Assoc. of Chiefs of Police.

Cita Chicago (17th ed.)

Sterling, James W. Changes in Role Concepts of Police Officers. Wash.: International Assoc. of Chiefs of Police, 1972.

Cita MLA (8th ed.)

Sterling, James W. Changes in Role Concepts of Police Officers. International Assoc. of Chiefs of Police, 1972.