Cita APA (7a ed.)

Codd, D. F., & Dean, A. L. (1971). Proceedings of the 1971 ACM SIGFIDET (now SIGMOD) Workshop on Data Description, Access and Control. Association for Computing Machinery.

Cita Chicago Style (17a ed.)

Codd, David F., y Albert L. Dean. Proceedings of the 1971 ACM SIGFIDET (now SIGMOD) Workshop on Data Description, Access and Control. New York, NY: Association for Computing Machinery, 1971.

Cita MLA (9a ed.)

Codd, David F., y Albert L. Dean. Proceedings of the 1971 ACM SIGFIDET (now SIGMOD) Workshop on Data Description, Access and Control. Association for Computing Machinery, 1971.