Cita APA (7a ed.)

Cromwell, P. F., & Keefer, G. (1973). Police-community relations. West Publ.

Cita Chicago Style (17a ed.)

Cromwell, Paul F., y George Keefer. Police-community Relations. St. Paul, Minn: West Publ, 1973.

Cita MLA (9a ed.)

Cromwell, Paul F., y George Keefer. Police-community Relations. West Publ, 1973.