Black, James Menzies, author
Prentica-Hall , 1957
Buku Teks
Cerami, Charles A., author
Prentice-Hall, 1957
Buku Teks
Younger, Sandra Millers, author
American Society for Training and Development Press, 1997
eBooks
Schleh, Edward C., author
McGraw-Hill, 1984
Buku Teks
Sheftel, Phoebe A., author
[American Society for Training & Development Press, American Society for Training & Development Press], 2001
eBooks