^H.K. Hines, An Illustrated History of the State of Washington: Containing a History of the State of Washington from the Earliest Period of Its Discovery to the Present Time, Together with Glimpses of its Auspicious Future, Illustrations and Full-page Portraits of Some of Its Eminent Men and Biographical Mention of Many of Its Pioneers and Prominent Citizens of To-day. Chicago, IL: Lewis Publishing Co., 1893; pg. 349.
^Hines, An Illustrated History of the State of Washington, pg. 350.
^"George Edward Cole," in Biographical Directory of the United States Congress, 1774-Present. www.bioguide.congress.gov/ "نسخة مؤرشفة". مؤرشف من الأصل في 2015-04-02. اطلع عليه بتاريخ 2019-03-01.{{استشهاد ويب}}: صيانة الاستشهاد: BOT: original URL status unknown (link)
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