Brinkerhoff, Robert O., author
Sage, 1990
Buku Teks
Garcia-Nunez, Jose, author
Kumarian Press, 1992
Buku Referensi
Talley, Dorsey J.
ASQC Quality Press , 1988
Buku Teks
Thompson, Leigh L., author
Pearson - Prentice Hall, 2008
Buku Teks
Taylor, James, author
American Management Association, 2006
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