Gaya APA

Triumph of The City : How Our Greatest Invention Makes Us Richer, Smarter, Greener, Healthier, and Happier. (2012). New York: Penguin Book Ltd..

Gaya MLA

Triumph of The City : How Our Greatest Invention Makes Us Richer, Smarter, Greener, Healthier, and Happier. . New York: Penguin Book Ltd., 2012. Text.