Clark, Ruth Colvin
VA ATD Press, 2015
Buku Teks
Murray, MIchelle L.
Springer Publishing Company, 2009
Buku Teks
Clark, Ruth Colvin
American Society for Training & Development, 2010
eBooks
Ruth Colvin Clark
ASTD Press, 2010
Buku Teks
Rubin, Allen
John Wiley & Sons, 2012
Buku Teks