Hutchinson, E.P., author
Houghton Mifflin, 1967
Buku Teks
Centre on Transnational Corporations
Economic and Social Commision for Asia and Pacific, 1983
Buku Teks
Donaldson, Loraine
N.Y. Praeger , 1966
Buku Teks
Gittinger, J. Price, author
National Planning Association , 1965
Buku Teks
Russell, Jeffrey, author
American Society for Training & Development, 2006
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