Koerner, Robert M., author
Pearson - Prentice Hall, 2005
Buku Teks
Upton, Monroe
The Devin-Adair Co., 1959
Buku Teks
Rachel Cooper, Graeme Evans, Christopher Boyko, editor
BlackWell Publishing, 2009
Buku Teks
Neal, Bruno, author
American Society for Training & Development, 2012
eBooks
Galbraith, Jay R., author
Addison-Wesley, 1973
Buku Teks