APA

Rosenkrantz D. J., Association for Computing Machinery, ACM Special Interest Group on Artificial Intelligence, ACM Special Interest Group on Management of Data & ACM Special Interest Group on Algorithms and Computation Theory. (1990). Proceedings of the ninth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems. New York, NY: ACM.

Chicago

Rosenkrantz Daniel J, Association for Computing Machinery, ACM Special Interest Group on Artificial Intelligence, ACM Special Interest Group on Management of Data and ACM Special Interest Group on Algorithms and Computation Theory. 1990. Proceedings of the ninth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems. New York, NY: ACM.

Harvard

Rosenkrantz D. J., Association for Computing Machinery, ACM Special Interest Group on Artificial Intelligence, ACM Special Interest Group on Management of Data and ACM Special Interest Group on Algorithms and Computation Theory. (1990). Proceedings of the ninth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems. New York, NY: ACM.

MLA

Rosenkrantz Daniel J, Association for Computing Machinery, ACM Special Interest Group on Artificial Intelligence, ACM Special Interest Group on Management of Data and ACM Special Interest Group on Algorithms and Computation Theory. Proceedings of the ninth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems. New York, NY: ACM. 1990.