@InCollection{robinson2017mpp,
  author = 	 {Kilcullen, John and Robinson, Jonathan},
  date = 	 2017,
  title = 	 {Medieval Political Philosophy},
  booktitle =    {The Stanford Encyclopedia of Philosophy},
  edition =      {Summer 2017},
  location =     {Stanford},
  publisher =    {Metaphysics Research Lab, Stanford University},
  url =          {https://plato.stanford.edu/archives/sum2017/entries/medieval-political/},
  keywords =     {medieval political philosophy, augustine, aquinas,
                  john of praris, giles of rome, marsilius of padua,
                  william of ockham},
}

% BibTeX
@InCollection{robinson2014otso,
  author = 	 {Kilcullen, John and Robinson, Jonathan},
  year =         2017,
  title = 	 {Medieval Political Philosophy},
  booktitle =    {The Stanford Encyclopedia of Philosophy},
  edition =      {Summer 2017},
  address =     {Stanford},
  publisher =    {Metaphysics Research Lab, Stanford University},
  url =          {https://plato.stanford.edu/archives/sum2017/entries/medieval-political/},
  keywords =     {medieval political philosophy, augustine, aquinas,
                  john of praris, giles of rome, marsilius of padua,
                  william of ockham},
}