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Prentice-Hall, 1949
Buku Teks
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Kluwer, 1994
Buku Teks
Artikel Jurnal
Estey, James Arthur
Prentice-Hall, 1956
Buku Teks
Silalahi, Ignatius Ramos, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2015
UI - Skripsi (Membership)