APA (7th ed.) Citation

Aaron, R. I. (1967). The theory of universals (2a. ed.). Oxford University.

Chicago Style (17th ed.) Citation

Aaron, Richard I. The Theory of Universals. 2a. ed. Londres: Oxford University, 1967.

MLA (9th ed.) Citation

Aaron, Richard I. The Theory of Universals. 2a. ed. Oxford University, 1967.