Kinicki, Angelo, author
McGraw-Hill, 2008
Buku Teks
Waters, Donald, author
Addison-Wesley, 1998
Buku Teks
RMIT University
Palgrave Macmillan, 2012
Buku Teks
Higgins, James M., author
Macmillan, 1994
Buku Teks
Faguet, Dmitri, author
John Wiley & Sons, 2003
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