APA (7th ed.) Citation

Siegel, F. F. (1997). The future once happened here: New York, D.C., L.A., and the fate of America's big cities. Free Press.

Chicago Style (17th ed.) Citation

Siegel, Frederick F. The Future Once Happened Here: New York, D.C., L.A., and the Fate of America's Big Cities. New York: Free Press, 1997.

MLA (9th ed.) Citation

Siegel, Frederick F. The Future Once Happened Here: New York, D.C., L.A., and the Fate of America's Big Cities. Free Press, 1997.