Dyfyniad APA

Weyl, H., & Helmer, O. (2009). Philosophy of mathematics and natural science. Princeton.

Dyfyniad Arddull Chicago

Weyl, Hermann, and Olaf Helmer. Philosophy of Mathematics and Natural Science. New Jersey: Princeton, 2009.

Dyfyniad MLA

Weyl, Hermann, and Olaf Helmer. Philosophy of Mathematics and Natural Science. Princeton, 2009.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.