Cita APA (7a ed.)

Childs, H., & Riley, J. (1951). Self-education for the police (10th ed.). "Police Review".

Cita Chicago Style (17a ed.)

Childs, Horatio, y J. Riley. Self-education for the Police. 10th ed. London: "Police Review", 1951.

Cita MLA (9a ed.)

Childs, Horatio, y J. Riley. Self-education for the Police. 10th ed. "Police Review", 1951.