Flynn, Peter, author
International Thomson , 1995
Buku Teks
Andrew Herman, Thomas Swiss, editor
Routledge, 2000
Buku Teks
Bradley, Phil, author
Aslib, 2000
Buku Teks
Lykins, Lorrie, author
American Society for Training & Development, 2011
eBooks
Graham, David T., author
Prentice-Hall, 2000
Buku Teks