Aaron, R. I. (1967). The theory of universals (2a. ed.). Oxford University.
Tohutoru Kātū Chicago (17th ed.)Aaron, Richard I. The Theory of Universals. 2a. ed. Londres: Oxford University, 1967.
Tohutoro MLA (9th ed.)Aaron, Richard I. The Theory of Universals. 2a. ed. Oxford University, 1967.
Kia tūpato: Kāore pea ēnei kupu hautoa i te ōrite pū 100%.