Haag, S., & Cummings, M. (2006). Information Systems Essentials. McGraw Hill.
Chicago-čujuhus (17. p.)Haag, Stephen, juo Maeve Cummings. Information Systems Essentials. Boston: McGraw Hill, 2006.
MLA-čujuhus (9. p.)Haag, Stephen, juo Maeve Cummings. Information Systems Essentials. McGraw Hill, 2006.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.