Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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