Cita APA (7a ed.)

Ullman, J. D., & Widom, J. (2014). A first course in database systems (Third edition, Pearson new international editon.). Pearson.

Cita Chicago Style (17a ed.)

Ullman, Jeffrey D., y Jennifer Widom. A First Course in Database Systems. Third edition, Pearson new international editon. Harlow, England: Pearson, 2014.

Cita MLA (8a ed.)

Ullman, Jeffrey D., y Jennifer Widom. A First Course in Database Systems. Third edition, Pearson new international editon. Pearson, 2014.