Steele, Fritz
University of Massachusetts, 1975
Buku Teks
Pietrzak, Theodore, author
[American Society for Training & Development Press, American Society for Training & Development Press], 2003
eBooks
Gendelman, Joel, author
American Society for Training & Development, 2010
eBooks
Watzlawick, Paul
W. W. Norton & Company, 1974
Buku Teks
Harvard Business School Press, 2004
Buku Teks