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1956: The Problem of Knowledge, Londres, Macmillan.
1957: "The conception of probability as a logical relation", en S. Korner, ed., Observation and Interpretation in the Philosophy of Physics, Nueva York, Dover Publications.
1963: The Concept of a Person and Other Essays, Londres, Macmillan.
1967: "Has Austin Refuted the Sense-Data Theory?" Synthese vol. XVIII, pp. 117–140.
1968: The Origins of Pragmatism, Londres, Macmillan.
1969: Metaphysics and Common Sense, Londres, Macmillan.
1971: Russell and Moore: The Analytical Heritage, Londres, Macmillan.
1972: Probability and Evidence, Londres, Macmillan.
1979: "Replies", en G. Macdonald, ed., Perception and Identity: Essays Presented to A. J. Ayer, With His Replies, Londres, Macmillan; Ithaca, N.Y., Cornell University Press.