WebCite at http://www.webcitation.org/index may be used to preserve links which are in danger of loss. Realistically, that includes most links but particularly links in newspapers, on hobby websites, and in the student pages of educational institutions. Go to http://www.webcitation.org/archive.php fill in the requested information and submit. A page will load with a url to a permanent citation stored at WebCite.
This service can also be used in the case of sites where the conditions of service discourages links or in the case of sites blacklisted by Wikia's spam filter.