Ayer, A. J. (1956). The problem of knowledge. Penguin Books.
Chicagoスタイル(17版)引用形式Ayer, A. J. The Problem of Knowledge. Harmondsworth, Middlesex: Penguin Books, 1956.
MLA(9版)引用形式Ayer, A. J. The Problem of Knowledge. Penguin Books, 1956.
警告: この引用は必ずしも正確ではありません.