The ethical treatises : being the treatises of the first Ennead with Porphyry's Life of Plotinus, and the Preller-Ritter extracts forming a conspectus of the Plotinian system / translated from the Greek by Stephen Mackenna.
Electronic reproduction. Medford, MA : Tisch Library, Tufts University, 2015. Scanned by the Boston Library Consortium/Open Content Alliance as part of the BLC OCA Digitization Project from a copy at the Tisch Library, Tufts University.