APA (6th ed.):
ProCon.org. (2014, September 2). Vaccine Histories and Impact on Diseases. Retrieved from https://www.procon.org/vaccine-histories-and-impact-on-diseases/
[Editor's Note: The APA citation style requires double spacing within entries.]
Chicago (17th ed.):
ProCon.org, "Vaccine Histories and Impact on Diseases," ProCon.org. last modified September 2, 2014. https://www.procon.org/vaccine-histories-and-impact-on-diseases/.
MLA (8th ed.):
ProCon.org, "Vaccine Histories and Impact on Diseases." ProCon.org. 2 Sep. 2014, www.procon.org/vaccine-histories-and-impact-on-diseases/
[Editor’s Note: The MLA citation style requires double spacing within entries.]
Turabian (8th ed.):
ProCon.org. "Vaccine Histories and Impact on Diseases." ProCon.org. Last modified on September 2, 2014. Accessed January 16, 2021. https://www.procon.org/vaccine-histories-and-impact-on-diseases/