@article{487111,
      author = {Cooper, John G.},
      url = {http://library.usi.edu/record/487111},
      title = {Youth gangs causes, violence and interventions /  [electronic resource] :},
      publisher = {Nova Science Publishers,},
      recid = {487111},
      pages = {257 p. :},
      address = {New York :},
      year = {2009},
}