Ullman, J. D. (1996). Principles of Database Systems (2nd ed.). Galgotia Publications(P) Ltd.
Chicago-čujuhus (17. p.)Ullman, Jeffrey D. Principles of Database Systems. 2nd ed. New Delhi: Galgotia Publications(P) Ltd, 1996.
MLA-čujuhus (9. p.)Ullman, Jeffrey D. Principles of Database Systems. 2nd ed. Galgotia Publications(P) Ltd, 1996.
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