"Valor Awards for George Columbus Barnhardt." Valor Awards for George Columbus Barnhardt. Military Times, n.d. Web. 12 Aug. 2016. [1]>. نسخة محفوظة 16 أغسطس 2016 على موقع واي باك مشين.
web.archive.org
"Valor Awards for George Columbus Barnhardt." Valor Awards for George Columbus Barnhardt. Military Times, n.d. Web. 12 Aug. 2016. [1]>. نسخة محفوظة 16 أغسطس 2016 على موقع واي باك مشين.
worldcat.org
Marquis Who's Who, Inc. Who Was Who in American History, the Military. Chicago: Marquis Who's Who, 1975. P. 30ISBN 0837932017 657162692
Davis, Henry Blaine. Generals in Khaki. Raleigh, NC: Pentland Press, 1998. P. 23 (ردمك 1571970886) 231779136
Davis, Henry Blaine. Generals in Khaki. Raleigh, NC: Pentland Press, 1998. P. 23–24 (ردمك 1571970886) 231779136
Davis, Henry Blaine. Generals in Khaki. Raleigh, NC: Pentland Press, 1998. P. 24 (ردمك 1571970886) 231779136