Adam, Bob
Adams Media Corporation, 1997
Multimedia
Camp, Jim
Kelompak Gramedia, 2002
Buku Teks
Hendro, author
Andi, 2005
Buku Teks
McClay, Renie, author
American Society for Training & Development, 2009
eBooks
Turmel, Wayne, author
American Society for Training & Development, 2011
eBooks