@article{335183,
      recid = {335183},
      author = {Ritterfeld, Ute. and Cody, Michael J. and Vorderer,  Peter.},
      title = {Serious games : mechanisms and effects /},
      publisher = {Routledge,},
      address = {New York :},
      pages = {xxii, 530 p. :},
      year = {2009},
      url = {http://library.usi.edu/record/335183},
}