de By, R. A. (2014). Proceedings of the 3rd ACM SIGSPATIAL International Workshop on Crowdsourced and Volunteered Geographic Information. Association for Computing Machinery.
Chicago-Zitierstil (17. Ausg.)de By, Rolf A. Proceedings of the 3rd ACM SIGSPATIAL International Workshop on Crowdsourced and Volunteered Geographic Information. New York,NY,United States: Association for Computing Machinery, 2014.
MLA-Zitierstil (9. Ausg.)de By, Rolf A. Proceedings of the 3rd ACM SIGSPATIAL International Workshop on Crowdsourced and Volunteered Geographic Information. Association for Computing Machinery, 2014.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.