Sears, F. W. (1968). Introduction to the theory of relativity. Addison-Wesley Pub. Co..
Cita Chicago (17th ed.)Sears, Francis Weston. Introduction to the Theory of Relativity. Reading, Mass: Addison-Wesley Pub. Co., 1968.
Cita MLA (9th ed.)Sears, Francis Weston. Introduction to the Theory of Relativity. Addison-Wesley Pub. Co., 1968.
Atenció: Aquestes cites poden no estar 100% correctes.