Παραπομπή APA

Sperling, D., & Gordon, D. (2009). Two billion cars: Driving toward sustainability. Oxford University Press.

Παραπομπή Chicago Style

Sperling, Daniel, και Deborah Gordon. Two Billion Cars: Driving Toward Sustainability. Oxford ; New York: Oxford University Press, 2009.

Παραπομπή MLA

Sperling, Daniel, και Deborah Gordon. Two Billion Cars: Driving Toward Sustainability. Oxford University Press, 2009.