Just to be clear here, the OP has a link to "/page" from the top-nav of the home page, from the left nav of the home page and from the footer of the home page. In order to see which link on the home page the user has clicked, the OP has added a query string paramter to the URL in the href.
This is a duplicate content situation, so you will need the rel="canonical" tag on the target page. You must also have at least one link that points to that canonical URL. That is, you must not have a situation where every link pointing to the sub-page has parameters.
You can also instruct Google to ignore the ?ref= parameter within WMT. This doesn't help with other search engines.