Kenyon, I. R. (1990). General relativity. O.U. Pr..
Cita Chicago (17th ed.)Kenyon, I. R. General Relativity. Oxford: O.U. Pr., 1990.
Cita MLA (9th ed.)Kenyon, I. R. General Relativity. O.U. Pr., 1990.
Atenció: Aquestes cites poden no estar 100% correctes.