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Amacom, 2006
Buku Teks
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American Management Association, 2006
eBooks
Falcone, Paul, author
American Management Association, 2007
eBooks
Muhamad Wahyudin, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2013
UI - Skripsi (Membership)
Fakultas Psikologi Universitas Indonesia, 2003
UI - Tesis (Membership)