Sullivan, W. (1961). Assault on the unknown: The International Geophysical Year. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Sullivan, Walter. Assault on the Unknown: The International Geophysical Year. New York: McGraw-Hill, 1961.
Lua MLA (9ú heag.)Sullivan, Walter. Assault on the Unknown: The International Geophysical Year. McGraw-Hill, 1961.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.