Artikel Jurnal
Stoeckel, Andrew, author
Centre for International Economics, 1990
Buku Teks
Pasaribu, Chandra Sahala, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 1994
UI - Skripsi (Membership)
Einzig, Paul
Macmillans Co , 1970
Buku Teks
Einzig, Paul
Macmillan, 1973
Buku Teks