Parkes, H. B. (1968). The United States of America, A History (3rd ed.). Scientific book agency.
शिकागो स्टाइल उद्धरणParkes, Henry Bamford. The United States of America, A History. 3rd ed. Calcutta: Scientific book agency, 1968.
एमएलए उद्धरणParkes, Henry Bamford. The United States of America, A History. 3rd ed. Scientific book agency, 1968.
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