Sachs, Jeffrey D.
Harvester Wheatsheaf, 1993
Buku Teks
Dornbusch, Rudiger
Basic Books, 1980
Buku Teks
Schiller, Bradley R.
McGraw-Hill , 1997
Buku Teks
Schiller, Bradley R.
Random House of Canada, 1980
Buku Teks
Schiller, Bradley R.
Prentica-Hall , 1975
Buku Teks