Lambert, Clark
John Wiley & Sons, 1981
Buku Teks SO
Stettner, Morey
McGraw-Hill, 2000
Buku Teks SO
Ellis, Carol W.
[American Management Association, ], 2005
eBooks
Mackechnie, Claire
Prestasi Pustaka, 2006
Buku Teks SO
Davis, Eric
[American Society for Training & Development Press, American Society for Training & Development Press], 2003
eBooks