APA (7th ed.) Citation

Sui, D. Z., Elwood, S., & Goodchild, M. F. (2013). Crowdsourcing geographic knowledge: Volunteered geographic information (VGI) in theory and practice. Springer Science+Business.

Chicago Style (17th ed.) Citation

Sui, Daniel Z., Sarah Elwood, and Michael F. Goodchild. Crowdsourcing Geographic Knowledge: Volunteered Geographic Information (VGI) in Theory and Practice. Dordrecht ; New York: Springer Science+Business, 2013.

MLA (9th ed.) Citation

Sui, Daniel Z., et al. Crowdsourcing Geographic Knowledge: Volunteered Geographic Information (VGI) in Theory and Practice. Springer Science+Business, 2013.