Kaufmann, W. J. (1978). Exploration of the solar system. Macmillan.
Cita Chicago (17th ed.)Kaufmann, William J. Exploration of the Solar System. Macmillan, 1978.
Cita MLA (9th ed.)Kaufmann, William J. Exploration of the Solar System. Macmillan, 1978.
Atenció: Aquestes cites poden no estar 100% correctes.