Basu, Kaushik, author
MIT Press, 2003
Buku Teks
Kirkpatrick, Colin H., author
George Allen and Unwin, 1984
Buku Teks
edited Charles R. Blitzer, Peter B. Clark and Lance Taylor
Oxford University Press, 1977
Buku Teks
Hettne, Bjorn 1939-
Longman Scientific & Technical , 1995
Buku Teks
World Bank
Oxford University Press, 1988
Buku Teks