APA citiranje

Ayer, A. J. (1984). Philosophy in the twentieth century. London: Counterpoint.

Trích dẫn kiểu Chicago

Ayer, A. J. Philosophy in the Twentieth Century. London: Counterpoint, 1984.

MLA citiranje

Ayer, A. J. Philosophy in the Twentieth Century. London: Counterpoint, 1984.

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