Bergmann, P. G. (1976). Introduction to the theory of relativity. Dover.
Cita Chicago (17th ed.)Bergmann, Peter Gabriel. Introduction to the Theory of Relativity. Nueva York: Dover, 1976.
Cita MLA (9th ed.)Bergmann, Peter Gabriel. Introduction to the Theory of Relativity. Dover, 1976.
Atenció: Aquestes cites poden no estar 100% correctes.