Hello,
Google has announced they are improving on the Explore feature in Google Docs to allow you to cite sources. With the click of a button in Explore in Docs on the web, you can insert citations from the web as footnotes. You can change the formatting of your citation making it easier to use MLA, APA, and Chicago styles. To cite a source, click Explore in the bottom-right of the screen. Enter search text and press Enter/Return. Then click Select citation format and make a style selection, the default is MLA. Then hover over the search result to cite and click Cite as footnote and a footnote is added to the Doc.