How do you insert links to a printed report? I want to write something along the lines of:

For this I shall be using the foo library


And I wish to insert a link to said library, but I am confused as how to properly write the link. Do I insert it as a citation, a footnote, or just leave it there in the text?
I prefer footnote or in text. Others would also consider using a citation. Check your local style guide. Here is one possibility (http://lib.westfield.ma.edu/webapa.htm)