Hoyer, Wayne D.
South Western Cengage Learning, 2012
Buku Teks SO
Wulf, Herbert
Palgrave Macmillan, 2005
Buku Teks SO
Fliehman, Deborah G.
ASQC Quality Press, 1994
Buku Teks SO
Golin, Al
[American Management Association;, ], 2004
eBooks
Victionary, 2010
Buku Referensi