Crowdsourcing Geographic Knowledge

MLA

Sui, Daniel, Sarah Elwood, and Michael Goodchild. Crowdsourcing Geographic Knowledge. Dordrecht: Springer Netherlands, 2013.

APA

Sui, D., Elwood, S., & Goodchild, M. (2013). Crowdsourcing Geographic Knowledge. Dordrecht: Springer Netherlands.

Chicago

Sui, Daniel, Sarah Elwood, and Michael Goodchild. Crowdsourcing Geographic Knowledge. Dordrecht: Springer Netherlands, 2013.