Bergmann, P. G. (1969). Introduction to the theory of relativity. Prentice-Hall of India.
शिकागो स्टाइल उद्धरणBergmann, Peter Gabriel. Introduction to the Theory of Relativity. New Delhi: Prentice-Hall of India, 1969.
एमएलए उद्धरणBergmann, Peter Gabriel. Introduction to the Theory of Relativity. Prentice-Hall of India, 1969.
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