Cellich, Claude, author
Business Expert Press, 2012
Buku Teks
Robinson, Colin
Gunung Mulia, 1993
Buku Teks
Walton, Richard E., author
Addison-Wesley, 1969
Buku Teks
Watkins, Michael, author
Jossey-Bass, 2002
Buku Teks
Baber, Anne, author
American Management Association, 2007
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