Russell, Anne
Prentive-Hall, 1982
Buku Teks
Maxey, Cindy, author
American Society for Training & Development, 2007
eBooks
Chick, Erica D., author
American Society for Training and Development Press;, 2004
eBooks
Enan, M.A.
Ashraf, 1946
Buku Teks
edited by Svend Dahl and H.G. Topsae-Jensen; translated by W. Glyn Jones
Berlingske Bogtr, 1955
Buku Teks