Gessford, J. E. (1980). Modern information systems: Designed for decision support. Addison-Wesley.
Citace podle Chicago (17th ed.)Gessford, John Evans. Modern Information Systems: Designed for Decision Support. Reading: Addison-Wesley, 1980.
Citace podle MLA (9th ed.)Gessford, John Evans. Modern Information Systems: Designed for Decision Support. Addison-Wesley, 1980.
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