Taylor, Ronald L., author
Allyn and Bacon, 2003
Buku Teks
Inghilleri, Leonardo, author
[American Management Association, ], 2010
eBooks
Labin, Jenn, author
American Society for Training & Development, 2010
eBooks
Conger, Jay A.
Jossey-Bass Publishers, 1989
Buku Teks
Prosek, Jennifer, author
American Management Association, 2011
Buku Teks