Dyfyniad APA

Dudley, U. (1997). Numerology, or, What Pythagoras wrought. Washington, DC: Mathematical Association of America.

Dyfyniad Arddull Chicago

Dudley, Underwood. Numerology, Or, What Pythagoras Wrought. Washington, DC: Mathematical Association of America, 1997.

Dyfyniad MLA

Dudley, Underwood. Numerology, Or, What Pythagoras Wrought. Washington, DC: Mathematical Association of America, 1997.

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