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Last updated on: 12/30/2011 | Author: ProCon.org

Medical Marijuana Historical Timeline

Posted on December 30, 2011 (June 24, 2020) by ProCon.org

– NEW: Medical Marijuana Historical Timeline – Our timeline traces medical marijuana from its earliest reference in 2900 BC as a popular Chinese medicine to 2011 where it remains legal in 16 states (and DC) and illegal under federal law. Read all 150+ major events in the history of medical marijuana from 90+ sources.

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ProCon.org is the institutional or organization author for all ProCon.org pages. Proper citation depends on your preferred or required style manual. Below are the proper citations for this page according to four style manuals (in alphabetical order): the Modern Language Association Style Manual (MLA), the Chicago Manual of Style (Chicago), the Publication Manual of the American Psychological Association (APA), and Kate Turabian's A Manual for Writers of Term Papers, Theses, and Dissertations (Turabian). Here are the proper bibliographic citations for this page according to four style manuals (in alphabetical order):

  • APA
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APA (6th ed.):
ProCon.org. (2011, December 30). Medical Marijuana Historical Timeline. Retrieved from https://www.procon.org/medical-marijuana-historical-timeline/

[Editor's Note: The APA citation style requires double spacing within entries.]

Chicago (17th ed.):
ProCon.org, "Medical Marijuana Historical Timeline," ProCon.org. last modified December 30, 2011. https://www.procon.org/medical-marijuana-historical-timeline/.
MLA (8th ed.):
ProCon.org, "Medical Marijuana Historical Timeline." ProCon.org. 30 Dec. 2011, www.procon.org/medical-marijuana-historical-timeline/

[Editor’s Note: The MLA citation style requires double spacing within entries.]

Turabian (8th ed.):
ProCon.org. "Medical Marijuana Historical Timeline." ProCon.org. Last modified on December 30, 2011. Accessed January 18, 2021. https://www.procon.org/medical-marijuana-historical-timeline/