NORTHAM, R. M. (1979). Urban geography. John Wiley.
Cita Chicago (17th ed.)NORTHAM, Ray M. Urban Geography. New York: John Wiley, 1979.
Cita MLA (9th ed.)NORTHAM, Ray M. Urban Geography. John Wiley, 1979.
Atenció: Aquestes cites poden no estar 100% correctes.