Emerson, Tricia
American Society for Training & Development, 2011
eBooks
Mangieri, John N.
John Wiley & Sons, Inc, 2004
Buku Teks
Arden, Paul
Esensi Erlangga Group, 2006
Buku Teks
Arden, Paul
Penguin, 2006
Buku Teks
Phillips, Jack J.
American Society for Training & Development, 2009
eBooks