Cita APA

Ullman, J. D., & Widom, J. (1997). A First course in database systems.

Chicago Edition Citation

Ullman, Jeffrey D., i Jennifer Widom. A First Course in Database Systems. New Jersey, Prentice-Hall, 1997.

Cita MLA

Ullman, Jeffrey D., i Jennifer Widom. A First Course in Database Systems. 1997.