Cita APA (7th ed.)
Warren, R. The Urban Oasis: Guideways and Greenways in the Human Environment. McGraw-Hill.
Cita Chicago (17th ed.)
Warren, Roxanne. The Urban Oasis: Guideways and Greenways in the Human Environment. Nueva York, EUA: McGraw-Hill.
Cita MLA (9th ed.)
Warren, Roxanne. The Urban Oasis: Guideways and Greenways in the Human Environment. McGraw-Hill.
Atenció: Aquestes cites poden no estar 100% correctes.