Larry Israelite, editor
American Society for Training & Development, 2010
eBooks
Mai, Robert P.
Astd & Irwin, 1996
Buku Teks
Hirsch, Eric Donald, Jr.
Houghton Miffiln, 2007
Buku Teks SO
Perkins, Dennis N.T.
[American Management Association, ], 2000
eBooks
Kelley, Tom
gramedia Pustaka utama, 2002
Buku Teks SO