Chen, Chris, author
McGraw-HIll , 2005
Buku Teks
Tamblyn, Doni, author
McGraw-HIll, 2000
Buku Teks
Thiagarajan, Sivasailam, author
American Society for Training & Development, 2007
eBooks
Kroehnert, Gary, author
North Ryde, 2005
Buku Teks
Kirk, James J., author
McGraww-Hill, 1997
Buku Teks