Cita APA

Ullman, J. D., & Korth, H. F. (1988). Principles of database and knowledge-base systems. Rockville, Md: Computer Science Press.

Chicago Style Citation

Ullman, Jeffrey D., i Henry F. Korth. Principles of Database and Knowledge-base Systems. Rockville, Md: Computer Science Press, 1988.

Cita MLA

Ullman, Jeffrey D., i Henry F. Korth. Principles of Database and Knowledge-base Systems. Rockville, Md: Computer Science Press, 1988.