Hughes, J. C. (2011). Slade Gorton: A half century in politics. Washington Secretary of State.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHughes, John C. Slade Gorton: A Half Century in Politics. [Olympia, Wash.]: Washington Secretary of State, 2011.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHughes, John C. Slade Gorton: A Half Century in Politics. Washington Secretary of State, 2011.
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