Bergmann, P. G. (1969). Introduction to the theory of relativity. Prentice-Hall of India.
Dyfyniad Arddull ChicagoBergmann, Peter Gabriel. Introduction to the Theory of Relativity. New Delhi: Prentice-Hall of India, 1969.
Dyfyniad MLABergmann, Peter Gabriel. Introduction to the Theory of Relativity. Prentice-Hall of India, 1969.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.