Pyzdek, Thomas, author
McGraw-Hill, 2003
Buku Referensi
edited by Jack Pinkowski
CRC Press, 2008
Buku Referensi
editor, Joseph M. Juran, A. Blanton Godfrey
McGraw-Hill, 1999
Buku Referensi
Wallace, Michael, author
American Management Association, 2011
eBooks
James A. Tompkins, Dale A. Harmelink [editors]
McGraw-Hill, 1994
Buku Referensi