Spadley, J. L. (1994). Visions that shaped the universe: A history of scientific ideas about the universe. McGraw-hill.
Lua i Stíl Chicago (17ú heag.)Spadley, Joseph L. Visions That Shaped the Universe: A History of Scientific Ideas About the Universe. New York: McGraw-hill, 1994.
Lua MLA (9ú heag.)Spadley, Joseph L. Visions That Shaped the Universe: A History of Scientific Ideas About the Universe. McGraw-hill, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.