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Cookie SettingsSui, D., Elwood, S., & Goodchild, M. (2012). Crowdsourcing geographic knowledge: Volunteered geographic information (VGI) in theory and practice. Springer.
Chicago Style CitationSui, Daniel, Sarah Elwood, and Michael Goodchild. Crowdsourcing Geographic Knowledge: Volunteered Geographic Information (VGI) in Theory and Practice. Heidelberg: Springer, 2012.
MLA CitationSui, Daniel, et al. Crowdsourcing Geographic Knowledge: Volunteered Geographic Information (VGI) in Theory and Practice. Springer, 2012.
Harvard Style CitationSui, D., Elwood, S. & Goodchild, M. 2012. Crowdsourcing geographic knowledge: Volunteered geographic information (VGI) in theory and practice. Heidelberg: Springer.
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