APA (7th ed.) Citation

Ayer, A. J. (1940). The foundations of empirical knowledge. Macmillan.

Chicago Style (17th ed.) Citation

Ayer, A. J. The Foundations of Empirical Knowledge. London: Macmillan, 1940.

MLA (9th ed.) Citation

Ayer, A. J. The Foundations of Empirical Knowledge. Macmillan, 1940.

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