Zeleny, Milan, 1942-, author
McGraw-Hill, 1982
Buku Teks
Edmundson, Andrea, author
American Society for Training & Development, 2010
eBooks
Lewis, Bernard, author
Weidenfeld and Nicolson, 1998
Buku Teks
Artikel Jurnal
Dobson, Michael S., author
American Management Association, 2011
eBooks