Medieval literary theory and criticism c.1100 - c.1375 : the commentary tradition
  MLA
  Minnis, A. J, A. Brian Scott, and David Wallace. Medieval Literary Theory and Criticism C.1100 - C.1375 : the Commentary Tradition. Rev. ed., repr. Oxford: Clarendon press, 2003.
  APA
  Minnis, A. J, Scott, A. Brian, & Wallace, D. (2003). Medieval literary theory and criticism c.1100 - c.1375 : the commentary tradition. Rev. ed., repr. Oxford: Clarendon press.
  Chicago
  Wallace, David Medieval Literary Theory and Criticism C.1100 - C.1375: The Commentary Tradition. Edited by A. J Minnis and A. Brian Scott.  Rev. ed., repr. Oxford: Clarendon press, 2003.