Gessford, J. E. (1980). Modern information systems: Designed for decision support. Addison-Wesley Pub. Co..
Lua i Stíl Chicago (17ú heag.)Gessford, John Evans. Modern Information Systems: Designed for Decision Support. Reading, Mass.: Addison-Wesley Pub. Co., 1980.
Lua MLA (9ú heag.)Gessford, John Evans. Modern Information Systems: Designed for Decision Support. Addison-Wesley Pub. Co., 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.