Kevin R. Cox and Reginald G. Golledge, editors
Routledge, 2016
Buku Teks
Osgood, Robert Endicott
Westview Press, 1979
Buku Teks
Hodell, Chuck, author
American Society for Training & Development, 2010
eBooks
edited by Thomas Deckker
Routledge, 2000
Buku Teks
Zimdahl, Robert L., author
Springer-Verlag, 2012
eBooks