APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (8:e uppl.)

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