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South Western Cengage Learning, 2012
Buku Teks
McCarthy, E. Jerome
Irwin, 1988
Buku Teks
Hoffman, K. Douglas
Harcourt College Publishers, 2002
Buku Teks
Zikmund, William G.
South Western Cengage Learning, 2013
Buku Teks
Fitzpatrick, Peter B.
AMA Membership Publications Division, American Management Association, 1985
Buku Teks