Cita APA (7a ed.)
Daniel Sui, S. E. Crowdsourcing Geographic Knowledge: Volunteered Geographic Information (VGI) in Theory and Practice. Springer.
Cita estilo Chicago (17a ed.)
Daniel Sui, Sarah Elwood. Crowdsourcing Geographic Knowledge: Volunteered Geographic Information (VGI) in Theory and Practice. Dordrecht, Holanda: Springer.
Cita MLA (9a ed.)
Daniel Sui, Sarah Elwood. Crowdsourcing Geographic Knowledge: Volunteered Geographic Information (VGI) in Theory and Practice. Springer.
Precaución: Estas citas no son 100% exactas.