Lua APA (7ú heag.)

O'Sullivan, A. (2019). Urban economics (Ninth edition.). McGraw-Hill Education.

Lua i Stíl Chicago (17ú heag.)

O'Sullivan, Arthur. Urban Economics. Ninth edition. New York: McGraw-Hill Education, 2019.

Lua MLA (8ú heag.)

O'Sullivan, Arthur. Urban Economics. Ninth edition. McGraw-Hill Education, 2019.

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