Dyfyniad APA

Valens, E. G. (1964). The number of things: Pythagoras, geometry, and humming strings (First edition.). Dutton.

Dyfyniad Arddull Chicago

Valens, Evans G. The Number of Things: Pythagoras, Geometry, and Humming Strings. First edition. New York: Dutton, 1964.

Dyfyniad MLA

Valens, Evans G. The Number of Things: Pythagoras, Geometry, and Humming Strings. First edition. Dutton, 1964.

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