Spade, P. V., & Porphyrius 233-301. (1994). Five texts on the mediaeval problem of universals: Porphyry, Boethius, Abelard, Duns Scotus, Ockham. Hackett.
芝加哥风格引文Spade, Paul Vincent, 与 Porphyrius 233-301. Five Texts on the Mediaeval Problem of Universals: Porphyry, Boethius, Abelard, Duns Scotus, Ockham. Indianapolis, Ind Cambridge: Hackett, 1994.
MLA引文Spade, Paul Vincent, 与 Porphyrius 233-301. Five Texts on the Mediaeval Problem of Universals: Porphyry, Boethius, Abelard, Duns Scotus, Ockham. Hackett, 1994.
警告：这些引文格式不一定是100％准确.