JSTOR provides great resources, but it is one of the few databases that does not provide copy-and-paste citations for its articles.  But don't despair! The directions in the center column will help you overcome this drawback.

In your results list, click on the title of the article you want to cite. 

When the article viewer displays, click on the Cite This Item button on the right.

A pop-up window will appear containing citations in MLA, APA, or Chicago (Turabian) format. Click on the clipboard icon to copy your chosen citation, then paste it into your document.  You may also choose to export the citation information to a citation manager.

ALWAYS double-check your citations! Visit the Writing Center or download their citation packets to make sure your citations are formatted correctly.