edited by Philip Sutton and Hazel M. Mitchell
CABI, 2010
Buku Teks
Russell, Lou, author
American Society for Training & Development, 2012
eBooks
Asia-Pacific Center, [date of publication not identified]
Buku Teks
National Academy Press, 1996
Buku Teks
Makridakis, Spyros G., author
The Free Press, 1990
Buku Teks