Richardson, Linda, author
McGraw-Hill, 2003
Buku Teks
Mackenizie, John
Illinois: Dow Jones-Irwin, 1989
Buku Teks
Scharf, Charles A., author
Prentice-Hall, 1985
Buku Teks
Brause, Rita S., author
RoutledgeFalmer , 2000
Buku Teks
Stockton B. Colt, editor
[American Management Association, ], 1998
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