Dyfyniad APA

Toulmin, S., & Goodfield, J. (1961). The fabric of the heavens. Penguin Books ltd.

Dyfyniad Arddull Chicago

Toulmin, Stephen, and June Goodfield. The Fabric of the Heavens. Hermondsworth: Penguin Books ltd, 1961.

Dyfyniad MLA

Toulmin, Stephen, and June Goodfield. The Fabric of the Heavens. Penguin Books ltd, 1961.

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