@article{327771,
      author = {Walker, Samuel, and Katz, Charles M.},
      url = {http://library.usi.edu/record/327771},
      title = {The police in America : an introduction /},
      publisher = {McGraw Hill,},
      recid = {327771},
      pages = {xxiii, 568 p. :},
      address = {Boston, Mass. :},
      year = {2008},
}