Citazione Stile APA (7a Edizione)

Ullman, J. D. (1982). Principles of Database Systems (2nd ed.). Computer Science Press.

Citazione stile Chigago Style (17a edizione)

Ullman, Jeffrey D. Principles of Database Systems. 2nd ed. 11 Taft Court, Rockville, Maryland 20850: Computer Science Press, 1982.

Citatione MLA (9a ed.)

Ullman, Jeffrey D. Principles of Database Systems. 2nd ed. Computer Science Press, 1982.