Russell, Bertrand, 1872-1970
Yayasan Obor Indonesia , 1993
Buku Teks
Mohammad Sjafei
Centre for Strategic and International Studies, 1979
Buku Teks
Cantor, Nathaniel
Agathon Press, 1972
Buku Teks
edited by Louis G. Locke, William M. Gibson, George W. Arm
Holt Rinehart and Winston, 1966
Buku Teks
Sharpe, Cat
[American Society for Training and Development Press, American Society for Training and Development Press], 2000
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