Calkins, M. (2011). The sustainable sites handbook. Wiley.
Lua i Stíl Chicago (17ú heag.)Calkins, Meg. The Sustainable Sites Handbook. Hoboken, N.J.: Wiley, 2011.
Lua MLA (9ú heag.)Calkins, Meg. The Sustainable Sites Handbook. Wiley, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.