Elaine Biech, editor
American Society for Training & Development, 2010
eBooks
George M. Piskurich, editor in chief
McGraw-Hill, 1993
Buku Referensi
edited by Mel Silberman
ASTD Press, 2005
eBooks
editor, Mel Silberman ; assistant editor, Patricia Phillips
ASTD Press, 2006
eBooks
Elaine Biech, editor
American Management Association, 2008
eBooks