English, J., & Card, R. (1985). Butterworth's police law. Butterworths.
Cita Chicago Style (17a ed.)English, Jack, y Richard Card. Butterworth's Police Law. London: Butterworths, 1985.
Cita MLA (8a ed.)English, Jack, y Richard Card. Butterworth's Police Law. Butterworths, 1985.
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