Syamananda, Rong, author
Thai Watana Panich, 1973
Buku Teks
Van Beek, Steve, 1944-, author
Thames and Hudson, 1991
Buku Teks
Baker, Chris, author
Cambridge Press, 2007
Buku Teks
Vernon, Alexia, author
American Society for Training & Development, 2012
eBooks
Michael, Watkins, author
Doseochulpansoso, 2004
Buku Teks