Ratcliff, R. U. (1972). Urban land economics. Greenwood Press.
Cita Chicago (17th ed.)Ratcliff, Richard Updegraff. Urban Land Economics. Westport, Conn.: Greenwood Press, 1972.
Cita MLA (9th ed.)Ratcliff, Richard Updegraff. Urban Land Economics. Greenwood Press, 1972.
Atenció: Aquestes cites poden no estar 100% correctes.