Caruth, Donald L., author
Praeger, 2009
Buku Teks
Walker, James W., author
McGraw-Hill , 1980
Buku Teks
Martocchio, Joseph J., author
McGraw-Hill/Irwin, 2014
Buku Teks
Harbison, Frederick Harris, author
International Institute for Educational Planning Unesco , 1967
Buku Teks
Arthur, Diane, author
[American Management Association, ], 2006
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