Angha, Nader, author
Serambi Ilmu Semesta , 2005
Buku Teks
Zenger, John H., author
McGraw-Hill, 2004
Buku Referensi
Zenger, John H., author
McGraw-Hill, 2003
Buku Teks
Blanchard, Kenneth H., author
Fontana/Collins , 1987
Buku Teks
Uldrich, Jack, author
[American Management Association, ], 2005
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