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Buku Teks
World Bank, 1974
Buku Teks
edited by Gerard Caprio, Jr., Izak Atiyas, and James A. Hanson
Cambridge University Press, 1996
Buku Teks
Marland, Sidney P.
McGraw-Hill, 1974
Buku Teks
edited by Fredrick B. Pike
University of Notre Dame Press, 1959
Buku Teks