Tracy, Brian, author
American Management Association, 2010
eBooks
Wilkins, David, 1971-, author
Mc-Graw-Hill, 2013
Buku Teks
Deming, Vasudha Kathleen, author
McGraw-Hill, 2004
Buku Teks
edited by Stephen Haines
Jaico Publishing House, 2007
Buku Teks
Cohen, William A., author
American Management Association, 2006
eBooks