Goetsch, David L.
Pearson-Prentice Hall, 2004
Buku Teks SO
Kadish, Jules E.
Artech House , 1993
Buku Teks SO
Cobb, Anthony T.
Sage, 2006
Buku Teks
Wheelan, Susan A.
Sage, 1999
Buku Teks
Russell, Lou
American Society for Training & Development, 2007
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