Cita APA

Ayer, A. J. (1956). Problem of knowledge. Middlesex Penguin.

Citación estilo Chicago

Ayer, A. J. Problem of Knowledge. Harmondsworth: Middlesex Penguin, 1956.

Cita MLA

Ayer, A. J. Problem of Knowledge. Middlesex Penguin, 1956.

Warning: These citations may not always be 100% accurate.