Gugin, Linda C.; St. Clair, James E (编). The Governors of Indiana. Indianapolis, Indiana: Indiana Historical Society Press. 2006 [2015-11-30]. ISBN 0-87195-196-7. (原始内容存档于2021-03-09).
Quayle Museum staff. Indiana's Five. Dan Quayle Museum. 2010-01-28 [2012-09-09]. (原始内容存档于2012-09-09).
senate.gov
Hatfield, Mark O.; with the Senate Historical Office. Vice Presidents of the United States, 1789-1993. Washington: U.S. Government Printing Office. 1997: 337–343 [2015-12-02]. Reprint on U.S. Senate website. (原始内容存档于2015-09-14). — Introduction by Mark O. Hatfield (for full citation from the Senate website, see printer option at the bottom of the webpage).
time.com
content.time.com
Suddath, Claire. Thomas Marshall. Time. 2008-08-21 [2015-11-30]. (原始内容存档于2015-05-27).
Gugin, Linda C.; St. Clair, James E (编). The Governors of Indiana. Indianapolis, Indiana: Indiana Historical Society Press. 2006 [2015-11-30]. ISBN 0-87195-196-7. (原始内容存档于2021-03-09).
Hatfield, Mark O.; with the Senate Historical Office. Vice Presidents of the United States, 1789-1993. Washington: U.S. Government Printing Office. 1997: 337–343 [2015-12-02]. Reprint on U.S. Senate website. (原始内容存档于2015-09-14). — Introduction by Mark O. Hatfield (for full citation from the Senate website, see printer option at the bottom of the webpage).
Suddath, Claire. Thomas Marshall. Time. 2008-08-21 [2015-11-30]. (原始内容存档于2015-05-27).