Bragg, Steven M., author
John Wiley & Sons, 1996
Buku Teks
Schniederjans, Marc J., author
Allyn and Bacon, 1992
Buku Teks
Harrison, Allan, author
Prentice-Hall, 1992.
Buku Teks
edited by Roger Z. Rios-Mercado,Yasmin A. Rios-Solis
[Springer, ], 2012
eBooks
Haneberg, Lisa, author
American Society for Training & Development, 2006
eBooks