Koerner, J. L. Contingency and the City: Joseph L. Koerner. Kontingenz.(1998).
Cita Chicago (17th ed.)Koerner, Joseph L. "Contingency and the City: Joseph L. Koerner." Kontingenz.(1998) .
Cita MLA (8th ed.)Koerner, Joseph L. "Contingency and the City: Joseph L. Koerner." Kontingenz.(1998), .
Atenció: Aquestes cites poden no estar 100% correctes.