Savitz, Andrew W., author
Jossey-Bass, 2014
Buku Teks
Pinkerton, William J., author
McGraw-Hill , 2003
Buku Teks
Horton, William, author
ASTD Press, 2001
Buku Teks
Zabel, William D.
William Morrow and Company, Inc., 1995
Buku Teks
International Engineering Consortium
International Engineering Consortium, 2005
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