Izdavač: Macmillan 1971;

Izdavač: The Free Press , New York 1965;

Izdavač: Hutchinson and Co Ltd, London 1970;

Izdavač: Arkana 1986;

Izdavač: Collins, London 1975;

Izdavač: George Allen and Unwin Ltd 1970;

Izdavač: Dover Publications, New York 1954;

Izdavač: The University of Chicago Press, Chicago 1972;

Izdavač: Southern Illinois University Press, Ferrer and Simon Inc., London, Amsterdam 1975;

Izdavač: George Allen and Unwin Ltd, Humanities Press Inc, London, New York 1969; Muirhead Library of Philosophy

Izdavač: Harper and Brothers, New York, London 1921;

Izdavač: Avon Books, New York 1972; Discus Books