Cita APA (7th ed.)
Calkins, M. (2011). The sustainable sites handbook. Wiley.
Cita Chicago (17th ed.)
Calkins, Meg. The Sustainable Sites Handbook. Hoboken, N.J.: Wiley, 2011.
Cita MLA (9th ed.)
Calkins, Meg. The Sustainable Sites Handbook. Wiley, 2011.
Atenció: Aquestes cites poden no estar 100% correctes.