O'Brien, J. A. (1997). Introduction to information systems (8thed.). McGraw-Hill.
Chicago-čujuhus (17. p.)O'Brien, James A. Introduction to Information Systems. 8thed. Boston, Mass.: McGraw-Hill, 1997.
MLA-čujuhus (9. p.)O'Brien, James A. Introduction to Information Systems. 8thed. McGraw-Hill, 1997.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.