Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 1993
UI - Skripsi (Membership)
DeTuncq, Toni
American Society for Training & Development, 2012
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Forsyth, Patrick
Institution of Engineering and Technology, 2007
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Hills, Struart L.
McGraw-Hill , 1980
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Chandos, 2013
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