Cita APA (7a ed.)

Ayer, A. J. (1966). The problem of Knowledge (Repr.). Penguin.

Cita Chicago Style (17a ed.)

Ayer, A. J. The Problem of Knowledge. Repr. Harmondsworth: Penguin, 1966.

Cita MLA (9a ed.)

Ayer, A. J. The Problem of Knowledge. Repr. Penguin, 1966.