Go to the Zotero Download page
There are two things to download for Zotero: The standalone Zotero program, and the Zotero Connector (which allows you to extract citations from your web browser). There will be a different options listed, depending on what type of system you are using (Mac, Windows or Linux).
Install the Zotero Standalone option.
If you do not have a PDF copy of the article in your Zotero library but you found the article in another database or ordered it via Interlibrary Loan, you can add the PDF to your citation by simply dragging and dropping the PDF from your file browser on to the citation in your Zotero library.
If you do not have a citation already saved in your library but you have a PDF, you can drag and drop the file directly in to your Zotero library. Then right-click on the PDF and select "Retrieve Metadata for PDF."
If this works correctly, Zotero will automatically find the citation information for your PDF and create a record for the item in your Zotero library:
If you are looking at a list of articles, you will see a folder icon; clicking on this will allow you to batch select multiple resources to add to your Zotero library:
Most databases work with just a simple click, but some (including Gale) have problems linking to your Zotero library. For trouble sites, you can right click in the webpage, and under the Zotero Connector menu, select "Save to Zotero (Embedded Metadata).
You will need to use your web browser to access your Zotero library.
You can export citations from your online Zotero library by clicking into the article record, and clicking on the Cite button:
You will be given the option to select which citation style you would like to use. The web version of Zotero does not support AMA format, but National Library of Medicine (NLM) style is very similar.
Select NLM style, and copy the citation that is formatted for you. Paste this citation in to your document, and modify it so that it meets the AMA style guidelines. Note in the example below how the format [Internet] is removed from AMA style formatting, and the accessed date is moved to the end of the citation:
NATIONAL LIBRARY OF MEDICINE STYLE
Fang S. The Successful Treatment of Pain Associated with Scar Tissue Using Acupuncture. Journal of Acupuncture and Meridian Studies [Internet]. 2014 Oct [cited 2016 Jun 9];7(5):262–4. Available from: http://linkinghub.elsevier.com/retrieve/pii/S2005290114000922.
Fang S. The Successful Treatment of Pain Associated with Scar Tissue Using Acupuncture. Journal of Acupuncture and Meridian Studies. 2014 Oct;7(5):262–4. http://linkinghub.elsevier.com/retrieve/pii/ S2005290114000922. Accessed June 9, 2016.
Use the Zotero bookmarklet.