Spade, P. V. (1994). Five texts on the mediaeval problem of universals: Porphyry, Boethius, Abelard, Duns Scotus, Ockham. Hackett.
Cita Chicago Style (17a ed.)Spade, Paul Vincent. Five Texts on the Mediaeval Problem of Universals: Porphyry, Boethius, Abelard, Duns Scotus, Ockham. Indianapolis [etc.]: Hackett, 1994.
Cita MLA (9a ed.)Spade, Paul Vincent. Five Texts on the Mediaeval Problem of Universals: Porphyry, Boethius, Abelard, Duns Scotus, Ockham. Hackett, 1994.
Precaución: Estas citas no son 100% exactas.