Cita APA (7th ed.)

BARKER, S. F. (1964). Philosophy of mathematics. Cliffs, Prentice-Hall.

Cita Chicago (17th ed.)

BARKER, Stephen F. Philosophy of Mathematics. Englewood: Cliffs, Prentice-Hall, 1964.

Cita MLA (9th ed.)

BARKER, Stephen F. Philosophy of Mathematics. Cliffs, Prentice-Hall, 1964.