Lawler, Edward E., author
JOSSEY - BASS, 2008
Buku Teks
Seagraves, Theresa, author
American Society for Training and Development Press, 2004
eBooks
Soundararajan, Ramesh, author
Sage Publications, 2019
eBooks
ed. by Nick Boulter, Murray Dalziel and Jackie Hill ; foreword by David McClelland
Crest Publishing House, 1999
Buku Referensi
Phillips, Jack J., author
American Management Association;, 2005
eBooks