Sabato, Larry J.; Ernst, Howard R. (2014 թ․ մայիսի 14). Encyclopedia of American Political Parties and Elections. Infobase Publishing. էջ 133. ISBN978-1-4381-0994-7. Վերցված է 2016 թ․ նոյեմբերի 15-ին. «in 1836...the Virginia electors abstained rather than vote for Democratic vice presidential nominee Richard Johnson"»
Green Mountain Freeman, Montpelier, VT June 20, 1845 p.1 "The Freeman: for The Freeman. Developments of the 'Peculiar Institution.'" Via Library of Congress, Chronicling America