Citazione Stile APA (7a Edizione)

Ullman, J. D., & Widom, J. (2008). A first course in database systems (3rd ed.). Pearson/Prentice Hall.

Citazione stile Chigago Style (17a edizione)

Ullman, Jeffrey D., e Jennifer Widom. A First Course in Database Systems. 3rd ed. Upper Saddle River, NJ: Pearson/Prentice Hall, 2008.

Citatione MLA (9a ed.)

Ullman, Jeffrey D., e Jennifer Widom. A First Course in Database Systems. 3rd ed. Pearson/Prentice Hall, 2008.