APA (7th ed.) Citation

Ullman & Widom. (1997). A first course in database systems. Prentice Hall.

Chicago Style (17th ed.) Citation

Ullman and Widom. A First Course in Database Systems. New Jersey: Prentice Hall, 1997.

MLA (9th ed.) Citation

Ullman and Widom. A First Course in Database Systems. Prentice Hall, 1997.

Warning: These citations may not always be 100% accurate.