APA (6th ed.):
ProCon.org. (2010, January 13). Timeline update. Retrieved from https://www.procon.org/timeline-update/
[Editor's Note: The APA citation style requires double spacing within entries.]
Chicago (17th ed.):
ProCon.org, "Timeline update," ProCon.org. last modified January 13, 2010. https://www.procon.org/timeline-update/.
MLA (8th ed.):
ProCon.org, "Timeline update." ProCon.org. 13 Jan. 2010, www.procon.org/timeline-update/
[Editor’s Note: The MLA citation style requires double spacing within entries.]
Turabian (8th ed.):
ProCon.org. "Timeline update." ProCon.org. Last modified on January 13, 2010. Accessed January 24, 2021. https://www.procon.org/timeline-update/