Gordon, Sallie E.
Prentice-Hall, 1994
Buku Teks
Chapnick, Samantha, author
[American Society for Training & Development Press, American Society for Training & Development Press], 2000
eBooks
U.S. Govt. Print, 1968
Buku Teks
Wakefield, Sarah, author
ASTD Press, 2011
Buku Teks
edited by Cheryl Gamble
American Society for Training & Development, 2010
eBooks