Kaufmann, W. J. (1978). Exploration of the solar system. Macmillan.
Lua i Stíl Chicago (17ú heag.)Kaufmann, William J. Exploration of the Solar System. New York: Macmillan, 1978.
Lua MLA (8ú heag.)Kaufmann, William J. Exploration of the Solar System. Macmillan, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.