@article{887355,
      recid = {887355},
      author = {Shoemaker, Pamela J. and Vos, Tim P.},
      title = {Gatekeeping theory [electronic resource] /},
      publisher = {Routledge,},
      address = {London ;},
      pages = {173 p. :},
      year = {2009},
      url = {http://library.usi.edu/record/887355},
}