APA (7th ed.) Citation

Ayer, A. J. (1990). The central questions of philosophy (Repr.). Penguins Books.

Chicago Style (17th ed.) Citation

Ayer, Alfred J. The Central Questions of Philosophy. Repr. London: Penguins Books, 1990.

MLA (9th ed.) Citation

Ayer, Alfred J. The Central Questions of Philosophy. Repr. Penguins Books, 1990.

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