Bell, Steven J, author
American Library Association, 2007
Buku Teks
editor in chief, Charles A. Harper
McGraw-Hill, 1980
Buku Referensi
Piskurich, George M., author
American Society for Training and Development, 2006
eBooks
editor, Cat Sharpe
[American Society for Training & Development;, ], 2005
eBooks
Labin, Jenn, author
American Society for Training & Development, 2010
eBooks