Dyfyniad APA

Pepper, I. K., & Pepper, H. (2009). Keywords in policing. Open University Press.

Dyfyniad Arddull Chicago

Pepper, Ian K., and Helen Pepper. Keywords in Policing. Maidenhead, Berkshire, Eng.: Open University Press, 2009.

Dyfyniad MLA

Pepper, Ian K., and Helen Pepper. Keywords in Policing. Open University Press, 2009.

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