Cita APA (7th ed.)
Ringwood, A. (1979). Origin of the earth and moon. Springer.
Cita Chicago (17th ed.)
Ringwood, A.E. Origin of the Earth and Moon. New York, Heidelberg, Berlin: Springer, 1979.
Cita MLA (9th ed.)
Ringwood, A.E. Origin of the Earth and Moon. Springer, 1979.
Atenció: Aquestes cites poden no estar 100% correctes.