(1961). Planetary and space science. Pergamon Press.
Lua i Stíl Chicago (17ú heag.)Planetary and Space Science. New York: Pergamon Press, 1961.
Lua MLA (9ú heag.)Planetary and Space Science. Pergamon Press, 1961.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.