Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2000
UI - Skripsi (Membership)
Artikel Jurnal
edited by Tom Sorell
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Buku Teks
Darr, Kurt
The John Hopkins University Press , 1997
Buku Teks
Judson, Karen, 1941-
McGra-Hill Connect Learn Succeed, 20103
Buku Teks