Shenson, Howard L.
John Wiley,, 1990
Buku Teks
Cottell, Philip G.
Quorum Books , 1990
Buku Teks
Diprima, Peter A., author
McGraw-Hill, 2012
Buku Teks
Clark, Ruth Colvin, author
American Society for Training & Development, 2010
eBooks
Ruth Colvin Clark
ASTD Press, 2010
Buku Teks