APA

de By R. A., Association for Computing Machinery-Digital Library, ACM Special Interest Group on Spatial Information & ACM Special Interest Group on Computer Graphics and Interactive Techniques. (2014). Proceedings of the 3rd ACM SIGSPATIAL International Workshop on Crowdsourced and Volunteered Geographic Information. New York, NY: ACM.

Chicago

de By Rolf A, Association for Computing Machinery-Digital Library, ACM Special Interest Group on Spatial Information and ACM Special Interest Group on Computer Graphics and Interactive Techniques. 2014. Proceedings of the 3rd ACM SIGSPATIAL International Workshop on Crowdsourced and Volunteered Geographic Information. New York, NY: ACM.

Harvard

de By R. A., Association for Computing Machinery-Digital Library, ACM Special Interest Group on Spatial Information and ACM Special Interest Group on Computer Graphics and Interactive Techniques. (2014). Proceedings of the 3rd ACM SIGSPATIAL International Workshop on Crowdsourced and Volunteered Geographic Information. New York, NY: ACM.

MLA

de By Rolf A, Association for Computing Machinery-Digital Library, ACM Special Interest Group on Spatial Information and ACM Special Interest Group on Computer Graphics and Interactive Techniques. Proceedings of the 3rd ACM SIGSPATIAL International Workshop on Crowdsourced and Volunteered Geographic Information. New York, NY: ACM. 2014.