Cita APA (7th ed.)
Ortiz B., P. The Art of Shaping the Metropolis. McGraw-Hill.
Cita Chicago (17th ed.)
Ortiz B., Pedro. The Art of Shaping the Metropolis. Nueva York, EUA: McGraw-Hill.
Cita MLA (9th ed.)
Ortiz B., Pedro. The Art of Shaping the Metropolis. McGraw-Hill.
Atenció: Aquestes cites poden no estar 100% correctes.