Cita APA (7th ed.)

Ullman, J. D. (1984). Principles of database systems (2nd ed.). Computer Science Press ; Galgotia Publication.

Cita Chicago (17th ed.)

Ullman, Jeffrey D. Principles of Database Systems. 2nd ed. Rockville, Md. : New Delhi: Computer Science Press ; Galgotia Publication, 1984.

Cita MLA (8th ed.)

Ullman, Jeffrey D. Principles of Database Systems. 2nd ed. Computer Science Press ; Galgotia Publication, 1984.