Proceedings of the 1980 ACM SIGMOD international conference on Management of data. Association for Computing Machinery (ACM).
Chicago-referens (17:e uppl.)Proceedings of the 1980 ACM SIGMOD International Conference on Management of Data. Association for Computing Machinery (ACM).
MLA-referens (9:e uppl.)Proceedings of the 1980 ACM SIGMOD International Conference on Management of Data. Association for Computing Machinery (ACM).
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.