APA (7th ed.):
ProCon.org. (2017, March 28). Vaccine Histories and Impact. ProCon.org. https://vaccines.procon.org/vaccine-histories-and-impact
[Editor's Note: The APA citation style requires double spacing within entries.]
Chicago (17th ed.):
ProCon.org, "Vaccine Histories and Impact," ProCon.org. last modified March 28, 2017. https://vaccines.procon.org/vaccine-histories-and-impact/.
MLA (9th ed.):
ProCon.org, "Vaccine Histories and Impact." ProCon.org. 28 Mar. 2017, vaccines.procon.org/vaccine-histories-and-impact
[Editor’s Note: The MLA citation style requires double spacing within entries.]
Turabian (9th ed.):
ProCon.org. "Vaccine Histories and Impact." ProCon.org. Last modified on March 28, 2017. Accessed May 6, 2022. https://vaccines.procon.org/vaccine-histories-and-impact/