Dunleavy, Patrick
Havester Wheatsheaf, 1991
Buku Teks
Dunleavy, Patrick
N.Y. Harvester , 1991
Buku Teks
Gwartney, James D., author
Dryden Press, 1995
Buku Teks
Gwartney, James D., author
Harcourt Brace Jovanovich, 1990
Buku Teks
Mueller, Dennis C., author
Cambridge University Press, 2005
Buku Teks