Gray,Wood. An outline of American history. The George Washington University.
शिकागो स्टाइल उद्धरणGray,Wood. An Outline of American History. Washington: The George Washington University.
एमएलए उद्धरणGray,Wood. An Outline of American History. The George Washington University.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.