Kingma, Bruce R.
Libraries Unlimited, Inc., 1996
Buku Teks
Frost, Michael J.
Gower Press, 1971
Buku Teks
Bruce, Colin
The World Bank , 1976
Buku Teks
Mishan, F.I.
Praeger, 1972
Buku Teks
editor, Cat Sharpe
[American Society for Training and Development Press, American Society for Training and Development Press], 1997
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