Krugman, Paul R., author
Addison-Wesley, 2000
Buku Teks
Culbertson, John M., author
McGraw-Hill, 1968
Buku Teks
Ackley, Gardner, author
Macmillan, 1978
Buku Teks
Branson, William H., author
Harper & Row, 1979
Buku Teks
Hansen, Alvin Harvey, 1887-1975, author
Amacom, 1977
Buku Teks