Isard, W. (1975). Introduction to regional science. Prentice-Hall.
Cita Chicago (17th ed.)Isard, Walter. Introduction to Regional Science. .Englewood Cliffs, N.J: Prentice-Hall, 1975.
Cita MLA (9th ed.)Isard, Walter. Introduction to Regional Science. Prentice-Hall, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.