APA-čujuhus (7. p.)
Ullman, J. D. (2002). Principles of database systems (2nd ed.). Galgotia Pub.
Chicago-čujuhus (17. p.)
Ullman, Jeffrey D. Principles of Database Systems. 2nd ed. New Delhi: Galgotia Pub, 2002.
MLA-čujuhus (9. p.)
Ullman, Jeffrey D. Principles of Database Systems. 2nd ed. Galgotia Pub, 2002.
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