edited by Richard M. Bird and Milka Casanegra de Jantscher
International Monetary Fund, 1992
Buku Teks SO
Artikel Jurnal
edited by Jose I. Furtado
Harwood Academic , 1990.
Buku Teks
Ginzberg, Eli, 1911-
McGraw-Hill, 1966
Buku Teks SO
edited by Marion Clawson
John Hopkins Press, 1965
Buku Teks