APA (7th ed.) Citation

Ovenden, M., & Ashworth, M. (2007). Transit maps of the world (2nd. rev. and expanded ed.). Penguin Books.

Chicago Style (17th ed.) Citation

Ovenden, Mark, and Mike Ashworth. Transit Maps of the World. 2nd. rev. and expanded ed. New York: Penguin Books, 2007.

MLA (9th ed.) Citation

Ovenden, Mark, and Mike Ashworth. Transit Maps of the World. 2nd. rev. and expanded ed. Penguin Books, 2007.