Ryder, L. H. (2009). Introduction to general relativity. Cambridge University Press.
शिकागो स्टाइल उद्धरणRyder, Lewis H. Introduction to General Relativity. Cambridge, UK ; New York: Cambridge University Press, 2009.
एमएलए उद्धरणRyder, Lewis H. Introduction to General Relativity. Cambridge University Press, 2009.
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