Toynbee, A. J. (1934). A study of history. Royal Institute of International Affairs.
शिकागो स्टाइल उद्धरणToynbee, Arnold J. A Study of History. Royal Institute of International Affairs, 1934.
एमएलए उद्धरणToynbee, Arnold J. A Study of History. Royal Institute of International Affairs, 1934.
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