Citazione Stile APA (7a Edizione)

Codd, E. F. (1990). The relational model for database management: Version 2. Addison-Wesley.

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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