Cita APA (7a ed.)

Ullman, J. D. (1989). Principles of database and knowledge-base systems. Computer Science.

Cita Chicago Style (17a ed.)

Ullman, Jeffrey D. Principles of Database and Knowledge-base Systems. Rockville, Maryland: Computer Science, 1989.

Cita MLA (9a ed.)

Ullman, Jeffrey D. Principles of Database and Knowledge-base Systems. Computer Science, 1989.