APA-referens

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

Chicago-stil citat

Toulmin, Stephen, och June Goodfield. The Fabric of the Heavens. England: Penguin, 1961.

MLA-referens

Toulmin, Stephen, och June Goodfield. The Fabric of the Heavens. Penguin, 1961.