Ballard, C. (2005). Database strategies: Using Informix XPS and DB2 Universal Database. IBM Corp., International Technical Support Organization.
Cita Chicago Style (17a ed.)Ballard, Chuck. Database Strategies: Using Informix XPS and DB2 Universal Database. [San Jose, Calif.: IBM Corp., International Technical Support Organization, 2005.
Cita MLA (9a ed.)Ballard, Chuck. Database Strategies: Using Informix XPS and DB2 Universal Database. IBM Corp., International Technical Support Organization, 2005.
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