@article{38518,
      recid = {38518},
      author = {Warrender, Howard.},
      title = {The political philosophy of Hobbes, his theory of  obligation.},
      publisher = {Clarendon Press,},
      address = {Oxford,},
      pages = {ix, 346 p.},
      year = {1957},
      url = {http://library.usi.edu/record/38518},
}