APA (6th ed.):
ProCon.org. (2014, March 21). Drug Ads Gallery, 1800s. Retrieved from https://prescriptiondrugs.procon.org/background-resources/drug-ads-gallery-1800s/
[Editor's Note: The APA citation style requires double spacing within entries.]
Chicago (17th ed.):
ProCon.org, "Drug Ads Gallery, 1800s," ProCon.org. last modified March 21, 2014. https://prescriptiondrugs.procon.org/background-resources/drug-ads-gallery-1800s/.
MLA (8th ed.):
ProCon.org, "Drug Ads Gallery, 1800s." ProCon.org. 21 Mar. 2014, prescriptiondrugs.procon.org/background-resources/drug-ads-gallery-1800s/
[Editor’s Note: The MLA citation style requires double spacing within entries.]
Turabian (8th ed.):
ProCon.org. "Drug Ads Gallery, 1800s." ProCon.org. Last modified on March 21, 2014. Accessed April 17, 2021. https://prescriptiondrugs.procon.org/background-resources/drug-ads-gallery-1800s/