Tretten, R. W. (1977). Cities in crisis: Decay or renewal? Prentice Hall.
Cita Chicago (17th ed.)Tretten, Rudie W. Cities in Crisis: Decay or Renewal? Prentice Hall, 1977.
Cita MLA (9th ed.)Tretten, Rudie W. Cities in Crisis: Decay or Renewal? Prentice Hall, 1977.
Atenció: Aquestes cites poden no estar 100% correctes.