Dyfyniad APA

Spadley, J. L. (1994). Visions that shaped the universe: A history of scientific ideas about the universe. McGraw-hill.

Dyfyniad Arddull Chicago

Spadley, Joseph L. Visions That Shaped the Universe: A History of Scientific Ideas About the Universe. New York: McGraw-hill, 1994.

Dyfyniad MLA

Spadley, Joseph L. Visions That Shaped the Universe: A History of Scientific Ideas About the Universe. McGraw-hill, 1994.

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