Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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