For most of the Infobase/Facts on File databases, the document URL for an article is included by the source citation located at the end of an article.
Be sure to copy the entire URL:
Example of a document URL:
http://icof.infobaselearning.com/recordurl.aspx?wid=100842&ID=2263
Here is the same URL but edited and ready to use and share:
http://0-icof.infobaselearning.com.archway.searchmobius.org/recordurl.aspx?wid=100842&ID=2263