Citazione Stile APA (7a Edizione)

Ayer, S. A. J. (1973). The central questions of philosophy. Weidenfeld and Nicolson.

Citazione stile Chigago Style (17a edizione)

Ayer, Sir Alfred Jules. The Central Questions of Philosophy. London: Weidenfeld and Nicolson, 1973.

Citatione MLA (9a ed.)

Ayer, Sir Alfred Jules. The Central Questions of Philosophy. Weidenfeld and Nicolson, 1973.