Lyttleton, R. A. (1968). Mysteries of the solar system. Clarendon.
Cita Chicago (17th ed.)Lyttleton, R. A. Mysteries of the Solar System. Oxford: Clarendon, 1968.
Cita MLA (9th ed.)Lyttleton, R. A. Mysteries of the Solar System. Clarendon, 1968.
Atenció: Aquestes cites poden no estar 100% correctes.