Hess. America's Political Dynasties. Brookings Institution Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHess. America's Political Dynasties. Brookings Institution Press.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHess. America's Political Dynasties. Brookings Institution Press.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.