Popovich, Igor S., author
Abdi Tandur, 1996
Buku Teks
Eyre, Vivian, author
Learning Express, 2000
Buku Teks
Grosse, Eric F., author
[American Society for Training & Development Press, American Society for Training & Development Press], 2002
eBooks
Falcone, Paul, author
American Management Association, 2009
eBooks
Beatty, Richard H.
John Wiley & Sons, 1995
Buku Teks