Chmara, Theresa, author
[American Management Association, ], 2009
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Dickson, Donald T.
New York Free Press 1998,
Buku Teks
Lowrance, William W., author
Cambridge University Press, 2012
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Disney, Julian, author
The Law Book, 1986
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Sheetz, Michael, author
John Wiley & Sons, 2007
Buku Teks