Cita APA (7th ed.)
O'Sullivan, A. (2009). Urban economics (7th ed.). McGraw-Hill/Irwin.
Cita Chicago (17th ed.)
O'Sullivan, Arthur. Urban Economics. 7th ed. Boston: McGraw-Hill/Irwin, 2009.
Cita MLA (9th ed.)
O'Sullivan, Arthur. Urban Economics. 7th ed. McGraw-Hill/Irwin, 2009.
Atenció: Aquestes cites poden no estar 100% correctes.