Cambridge University Press, 2020
eBooks
Halomoan, Ricardo
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2006
UI - Tesis Membership
Bly, Robert W.
American Management Association, 2006
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Maclean, Robert
Angus and Robertson, 1975
Buku Teks
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 1994
UI - Skripsi Membership