Martel, Myles
Dow Jones-Irwin, 1989
Buku Teks
R. Soesilo, author
Politeia, 1981
Buku Teks
A. Ridwan Halim, 1954-, author
Ghalia Indonesia, 1986
Buku Teks
DeForest, Holly, author
[American Society for Training & Development Press, American Society for Training & Development Press], 2005
eBooks
U.S. and World Publications, Inc., 1961
Buku Teks