Haag, S., & Cummings, M. (2006). Information Systems Essentials. McGraw Hill.
Lua i Stíl Chicago (17ú heag.)Haag, Stephen, agus Maeve Cummings. Information Systems Essentials. Boston: McGraw Hill, 2006.
Lua MLA (9ú heag.)Haag, Stephen, agus Maeve Cummings. Information Systems Essentials. McGraw Hill, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.