Παραπομπή σε μορφή APA (7η εκδ.)

Walker, R. (2007). The country in the city: The greening of the San Francisco Bay Area. University of Washington Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Walker, Richard. The Country in the City: The Greening of the San Francisco Bay Area. Seattle: University of Washington Press, 2007.

Παραπομπή σε μορφή MLA (9th εκδ.)

Walker, Richard. The Country in the City: The Greening of the San Francisco Bay Area. University of Washington Press, 2007.