Goodchild. Proceedings of the 1st ACM SIGSPATIAL International Workshop on Crowdsourced and Volunteered Geographic Information. Association for Computing Machinery (ACM).
Chicago Style (17. basım) AtıfGoodchild. Proceedings of the 1st ACM SIGSPATIAL International Workshop on Crowdsourced and Volunteered Geographic Information. Association for Computing Machinery (ACM).
MLA (9th ed.) AtıfGoodchild. Proceedings of the 1st ACM SIGSPATIAL International Workshop on Crowdsourced and Volunteered Geographic Information. Association for Computing Machinery (ACM).
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