Hoffman, W. Michael, author
New York, N.Y. , McGraw-Hill
Buku Teks
Trevino, Linda Klebe, author
John Wiley & Sons, 2007
Buku Teks
Trevino, Linda Klebe, author
John Wiley & Sons, 2004
Buku Teks
Paine, Lynn Sharp
Irwin, 1997
Buku Teks
Wulf, Katharina, author
[Gabler Verlag, Gabler Verlag], 2012
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