@article{273745,
      author = {Ratzan, Lee.},
      url = {http://library.usi.edu/record/273745},
      title = {Understanding information systems : what they do and why  we need them /},
      publisher = {American Library Association,},
      recid = {273745},
      pages = {xvi, 253 p. :},
      address = {Chicago :},
      year = {2004},
}