Rosser, J. Barkley, author
McGraw-Hill, 1996
Buku Teks
edited by Edward Friedman
Sage, 1982
Buku Teks
Nurkse, Ragnar, 1907-1959, author
Harvard University Press, 1962
Buku Teks
Williamson, John
Basic Books, Inc., 1983
Buku Teks
Salvatore, Dominick, author
Prentice-Hall, 1995
Buku Teks