APA (6th ed.):
ProCon.org. (2009, December 18). ProCon.org has now been used by 802 schools in 22 countries and all 50 US states. Retrieved from https://www.procon.org/procon-org-has-now-been-used-by-802-schools-in-22-countries-and-all-50-us-states/
[Editor's Note: The APA citation style requires double spacing within entries.]
Chicago (17th ed.):
ProCon.org, "ProCon.org has now been used by 802 schools in 22 countries and all 50 US states," ProCon.org. last modified December 18, 2009. https://www.procon.org/procon-org-has-now-been-used-by-802-schools-in-22-countries-and-all-50-us-states/.
MLA (8th ed.):
ProCon.org, "ProCon.org has now been used by 802 schools in 22 countries and all 50 US states." ProCon.org. 18 Dec. 2009, www.procon.org/procon-org-has-now-been-used-by-802-schools-in-22-countries-and-all-50-us-states/
[Editor’s Note: The MLA citation style requires double spacing within entries.]
Turabian (8th ed.):
ProCon.org. "ProCon.org has now been used by 802 schools in 22 countries and all 50 US states." ProCon.org. Last modified on December 18, 2009. Accessed January 17, 2021. https://www.procon.org/procon-org-has-now-been-used-by-802-schools-in-22-countries-and-all-50-us-states/