Tolong jelaskan mengenai Sumber dari Policraticus

Stanford Encyclopedia of Philosophy "John of Salisbury"

John of Salisbury, Ioannis Saresberiensis Policraticus I-IV, ed. K. S. B. Keats-Rohan, Corpus Christianorum Continuatio Mediaeualis 118 (Turnhout: Brepols, 1993).