APA (6th ed.):
ProCon.org. (2011, January 27). UPDATED: Historical Timeline – History of the Death Penalty. Retrieved from https://www.procon.org/updated-historical-timeline-history-of-the-death-penalty/
[Editor's Note: The APA citation style requires double spacing within entries.]
Chicago (17th ed.):
ProCon.org, "UPDATED: Historical Timeline – History of the Death Penalty," ProCon.org. last modified January 27, 2011. https://www.procon.org/updated-historical-timeline-history-of-the-death-penalty/.
MLA (8th ed.):
ProCon.org, "UPDATED: Historical Timeline – History of the Death Penalty." ProCon.org. 27 Jan. 2011, www.procon.org/updated-historical-timeline-history-of-the-death-penalty/
[Editor’s Note: The MLA citation style requires double spacing within entries.]
Turabian (8th ed.):
ProCon.org. "UPDATED: Historical Timeline – History of the Death Penalty." ProCon.org. Last modified on January 27, 2011. Accessed January 15, 2021. https://www.procon.org/updated-historical-timeline-history-of-the-death-penalty/