BARKER, S. F. (1964). Philosophy of mathematics. Cliffs, Prentice-Hall.
Chicago-čujuhus (17. p.)BARKER, Stephen F. Philosophy of Mathematics. Englewood: Cliffs, Prentice-Hall, 1964.
MLA-čujuhus (9. p.)BARKER, Stephen F. Philosophy of Mathematics. Cliffs, Prentice-Hall, 1964.
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