edited by Marc J. Epstein, Frank Verbeeten, Sally K. Widener
Emerald, 2016
eBooks
Lintern, D.G.
Pitman & Sons, Ltd., 1958
Buku Teks
Kirkpatrick, Donald L.
American Society for Training & Development, 2007
eBooks
Cooke, Robert
Wiley-blackwell, 2009
Buku Teks
Anderson, Norman A.
Chilton Book Company, 1980
Buku Teks