Consolmagno, G. J., & Schaefer, M. W. (1994). Worlds apart: A textbook in planetary sciences. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Consolmagno, Guy J., agus Martha W. Schaefer. Worlds Apart: A Textbook in Planetary Sciences. Englewood Cliffs, N.J.: Prentice-Hall, 1994.
Lua MLA (9ú heag.)Consolmagno, Guy J., agus Martha W. Schaefer. Worlds Apart: A Textbook in Planetary Sciences. Prentice-Hall, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.