Gendelman, Joel, author
ASTD Press, 2010
Buku Teks
Atwood, Christee Gabour
ASTD Press, 2007
Buku Teks
Haneberg, Lisa, author
American Society for Training & Development, 2006
eBooks
Gendelman, Joel, author
American Society for Training & Development, 2010
eBooks
Arnold, John D., author
McGraw-Hill, 1981
Buku Teks