Walker, R. (2007). The country in the city: The greening of the San Francisco Bay Area. University of Washington Press.
Lua i Stíl Chicago (17ú heag.)Walker, Richard. The Country in the City: The Greening of the San Francisco Bay Area. Seattle: University of Washington Press, 2007.
Lua MLA (9ú heag.)Walker, Richard. The Country in the City: The Greening of the San Francisco Bay Area. University of Washington Press, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.