Voe, Merrill De
Prentice-Hall, 1957
Buku Teks
Kirkpatrick, Donald L., author
American Society for Training & Development, 2006
eBooks
Peel, Malcolm, author
Gramedia Pustaka Utama, 1993
Buku Teks
Murphy, Martin, author
[American Management Association, ], 2013
eBooks
Lewis, Lynn Sparapany, author
American Society for Training & Development, 2008
eBooks