APA

Association for Computing Machinery, ACM Special Interest Group on Management of Data, ACM Special Interest Group on Artificial Intelligence & ACM Special Interest Group on Algorithms and Computation Theory. (1985). Proceedings of the fourth ACM SIGACT-SIGMOD symposium on Principles of database systems. New York, NY: ACM.

Chicago

Association for Computing Machinery, ACM Special Interest Group on Management of Data, ACM Special Interest Group on Artificial Intelligence and ACM Special Interest Group on Algorithms and Computation Theory. 1985. Proceedings of the fourth ACM SIGACT-SIGMOD symposium on Principles of database systems. New York, NY: ACM.

Harvard

Association for Computing Machinery, ACM Special Interest Group on Management of Data, ACM Special Interest Group on Artificial Intelligence and ACM Special Interest Group on Algorithms and Computation Theory. (1985). Proceedings of the fourth ACM SIGACT-SIGMOD symposium on Principles of database systems. New York, NY: ACM.

MLA

Association for Computing Machinery, ACM Special Interest Group on Management of Data, ACM Special Interest Group on Artificial Intelligence and ACM Special Interest Group on Algorithms and Computation Theory. Proceedings of the fourth ACM SIGACT-SIGMOD symposium on Principles of database systems. New York, NY: ACM. 1985.