APA Citation

(2013). Crowdsourcing geographic knowledge: Volunteered Geographic Information (VGI) in Theory and Practice.

Chicago Style Citation

Crowdsourcing Geographic Knowledge: Volunteered Geographic Information (VGI) in Theory and Practice. 2013.

MLA Citation

Crowdsourcing Geographic Knowledge: Volunteered Geographic Information (VGI) in Theory and Practice. 2013.

Warning: These citations may not always be 100% accurate.