Cita APA (7a ed.)

Ullman, J. D. (1988). Principles of database and knowledge-base systems. Computer Science Press.

Cita Chicago Style (17a ed.)

Ullman, Jeffrey D. Principles of Database and Knowledge-base Systems. Rockville, MA: Computer Science Press, 1988.

Cita MLA (9a ed.)

Ullman, Jeffrey D. Principles of Database and Knowledge-base Systems. Computer Science Press, 1988.