APA

Hoel E., Association for Computing Machinery, ACM Special Interest Group on Management Information Systems & ACM Special Interest Group on Information Retrieval. (2003). Proceedings of the 11th ACM international symposium on Advances in geographic information systems. New York, NY: ACM.

Chicago

Hoel Erik, Association for Computing Machinery, ACM Special Interest Group on Management Information Systems and ACM Special Interest Group on Information Retrieval. 2003. Proceedings of the 11th ACM international symposium on Advances in geographic information systems. New York, NY: ACM.

Harvard

Hoel E., Association for Computing Machinery, ACM Special Interest Group on Management Information Systems and ACM Special Interest Group on Information Retrieval. (2003). Proceedings of the 11th ACM international symposium on Advances in geographic information systems. New York, NY: ACM.

MLA

Hoel Erik, Association for Computing Machinery, ACM Special Interest Group on Management Information Systems and ACM Special Interest Group on Information Retrieval. Proceedings of the 11th ACM international symposium on Advances in geographic information systems. New York, NY: ACM. 2003.