Spade, P. V., & Porphyrius 233-301. (1994). Five texts on the mediaeval problem of universals: Porphyry, Boethius, Abelard, Duns Scotus, Ockham. Hackett.
Chicago Style (17th ed.) CitationSpade, Paul Vincent, and Porphyrius 233-301. Five Texts on the Mediaeval Problem of Universals: Porphyry, Boethius, Abelard, Duns Scotus, Ockham. Indianapolis, Ind Cambridge: Hackett, 1994.
MLA (9th ed.) CitationSpade, Paul Vincent, and Porphyrius 233-301. Five Texts on the Mediaeval Problem of Universals: Porphyry, Boethius, Abelard, Duns Scotus, Ockham. Hackett, 1994.
Warning: These citations may not always be 100% accurate.