edited by P.A. Lamal
Hemisphere, 1991
Buku Teks SO
Ramsay, Michael C.
John Wiley & Sons, 2002
Buku Teks SO
edited by Ronald J. Prinz
Jessica Kingsley, 1991
Buku Teks SO
Mitchell, Jennifer K.
American Society for Training & Development, 2006
eBooks
Robinson, Dana Gaines
American Society for Training & Development Press, 2000
eBooks