Gower , 1986
Buku Teks
Khan, Mohsin S., author
International Monetary Fund, 1985
Buku Teks
edited by William R. Cline and Sidney Weintraub
Washington, D.C. , Brooklins Institution
Buku Teks
Bulajic, Milan, author
Martinus Nijhoff, 1993
Buku Teks
Vissering, G.
[J. H. De Bussy], [date of publication not identified]
Buku Teks