APA引文

Ullman, J. D. (1983). Principles of database systems (2nd ed.). Computer Science Press.

Chicago Style (17th ed.) Citation

Ullman, Jeffrey D. Principles of Database Systems. 2nd ed. Rockville, Md: Computer Science Press, 1983.

MLA引文

Ullman, Jeffrey D. Principles of Database Systems. 2nd ed. Computer Science Press, 1983.