APA (6th ed.):
ProCon.org. (2013, January 28). Voting Systems & Use: 1980-2012. Retrieved from https://www.procon.org/voting-systems-use-1980-2012/
[Editor's Note: The APA citation style requires double spacing within entries.]
Chicago (17th ed.):
ProCon.org, "Voting Systems & Use: 1980-2012," ProCon.org. last modified January 28, 2013. https://www.procon.org/voting-systems-use-1980-2012/.
MLA (8th ed.):
ProCon.org, "Voting Systems & Use: 1980-2012." ProCon.org. 28 Jan. 2013, www.procon.org/voting-systems-use-1980-2012/
[Editor’s Note: The MLA citation style requires double spacing within entries.]
Turabian (8th ed.):
ProCon.org. "Voting Systems & Use: 1980-2012." ProCon.org. Last modified on January 28, 2013. Accessed April 14, 2021. https://www.procon.org/voting-systems-use-1980-2012/