Walker, Samuel
The police in America : an introduction
McGraw-Hill, 1992
 Buku Teks
Williams, Malcolm, 1953-
Science and social science: an introduction
Routledge, 2000
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Berg, Bruce Lawrence, 1954-
Law enforcement : an introduction to police in society
Allyn and Bacon, 1992
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Shipman, James T.
An introduction to physical science
D.C. Heath, 1990
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Taylor, Bernard W.
Introduction to management science
Prentice-Hall, 2004
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