Wheelan, Susan A.
Sage, 1999
Buku Teks
Russell, Lou, author
American Society for Training & Development, 2012
eBooks
Thompson, Leigh L., author
Pearson - Prentice Hall, 2008
Buku Teks
Maria Agnes Imelda Wulandari, author
2016
UI - Tesis Membership
Fogg, C. Davis
AMACOM, American Management Association, 1994
Buku Teks