APA Citation

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

Chicago Style Citation

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

MLA Citation

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

Figyelmeztetés: Nem biztos, hogy ezek a forráshivatkozások 100%-ig pontosak.