APA (7th ed.) Citation

Association for Computing Machinery, Special Interest Group on Spatial Information. (2009). SIGSPATIAL special. ACM.

Chicago Style (17th ed.) Citation

Association for Computing Machinery, Special Interest Group on Spatial Information. SIGSPATIAL Special. New York, NY: ACM, 2009.

MLA (9th ed.) Citation

Association for Computing Machinery, Special Interest Group on Spatial Information. SIGSPATIAL Special. ACM, 2009.

Warning: These citations may not always be 100% accurate.