APA (7th ed.) Citation

Gessford, J. E. (1980). Modern information systems: Designed for decision support. Addison-Wesley.

Chicago Style (17th ed.) Citation

Gessford, John E. Modern Information Systems: Designed for Decision Support. Reading, Mass: Addison-Wesley, 1980.

MLA (9th ed.) Citation

Gessford, John E. Modern Information Systems: Designed for Decision Support. Addison-Wesley, 1980.