Maxey, Cindy, author
American Society for Training & Development, 2007
eBooks
Swartz, Greg, author
American Society for Training & Development, 2008
eBooks
Johnson, Spencer, author
Gramedia, 2013
Buku Teks
Ferriss, Timothy, author
Vermilion, 2011
Buku Teks
Agness, Lindsey, author
Ufuk Press, 2012
Buku Teks