Cita APA

Codd, E. (1990). The relational model for database management: Version 2. Reading, [etc.]: Addison-Wesley.

Citación estilo Chicago

Codd, E.F. The Relational Model for Database Management: Version 2. Reading, [etc.]: Addison-Wesley, 1990.

Cita MLA

Codd, E.F. The Relational Model for Database Management: Version 2. Reading, [etc.]: Addison-Wesley, 1990.

Precaución: Estas citas no son 100% exactas.