APA (6th ed.):
ProCon.org. (2013, July 17). Historical Timeline: A History of Cow’s Milk from the Ancient World to the Present. Retrieved from https://www.procon.org/historical-timeline-a-history-of-cows-milk-from-the-ancient-world-to-the-present/
[Editor's Note: The APA citation style requires double spacing within entries.]
Chicago (17th ed.):
ProCon.org, "Historical Timeline: A History of Cow’s Milk from the Ancient World to the Present," ProCon.org. last modified July 17, 2013. https://www.procon.org/historical-timeline-a-history-of-cows-milk-from-the-ancient-world-to-the-present/.
MLA (8th ed.):
ProCon.org, "Historical Timeline: A History of Cow’s Milk from the Ancient World to the Present." ProCon.org. 17 July 2013, www.procon.org/historical-timeline-a-history-of-cows-milk-from-the-ancient-world-to-the-present/
[Editor’s Note: The MLA citation style requires double spacing within entries.]
Turabian (8th ed.):
ProCon.org. "Historical Timeline: A History of Cow’s Milk from the Ancient World to the Present." ProCon.org. Last modified on July 17, 2013. Accessed June 25, 2021. https://www.procon.org/historical-timeline-a-history-of-cows-milk-from-the-ancient-world-to-the-present/