Jack J. Phillips, Darelyn "DJ" Mitscm, editor
[American Society for Training & Development Press, American Society for Training & Development Press], 2002
eBooks
Axelrod, Wendy
Berrett Koehler, 2011
Buku Teks
Schwartz, Bernard
New York University Press, 1956
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Alexander, Roy, 1925-
American Management Association;, 2009
eBooks
Evans, G. R. (Gillian Rosemary)
Open University Press, 2002
Buku Teks