Greeno, Nathan J., author
American Society for Training & Development, 2006
eBooks
Czerniawski, Gerry, author
Open University Press, 2013
Buku Teks
Laskey, Marcia L., author
Allyn and Bacon, 1997
Buku Teks
Delphin, Patricia
Virgnia Reston publishing 1983 , 1983
Buku Teks
Richards, Jack C., author
Cambridge University Press, 2005
Buku Teks