Cita APA (7a ed.)

Weyl, H., & Helmer, O. (1949). Philosophy of mathematics and natural science. Princeton University Press.

Cita Chicago Style (17a ed.)

Weyl, Hermann, y Olaf Helmer. Philosophy of Mathematics and Natural Science. Princeton: Princeton University Press, 1949.

Cita MLA (9a ed.)

Weyl, Hermann, y Olaf Helmer. Philosophy of Mathematics and Natural Science. Princeton University Press, 1949.