APA (7th ed.) Citation

Ramm, F., Topf, J., & Chilton, S. (2011). OpenStreetMap: Using and enhancing the free map of the world. UIT Cambridge.

Chicago Style (17th ed.) Citation

Ramm, Frederik, Jochen Topf, and Steve Chilton. OpenStreetMap: Using and Enhancing the Free Map of the World. Cambridge, UK: UIT Cambridge, 2011.

MLA (9th ed.) Citation

Ramm, Frederik, et al. OpenStreetMap: Using and Enhancing the Free Map of the World. UIT Cambridge, 2011.