Birley, Sue
Financial Times Prentice Hall, 2000
Buku Teks SO
edited by Calvin A. Kent, Donald L. Sexton and Karl H. Vesper
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Buku Referensi
J. Winardi
Kencana Prenada Media, 2004
Buku Teks SO
J. Winardi
Kencana Prenada Media, 2015
Buku Teks SO
Harvard Business School Press, 1999
Buku Teks SO