Normally, the 'Citation' links in HubMed will export the citation details for an article in RIS format (suitable for Endnote or Procite, and others). To make things easier for users of the web-based bibliography manager Refworks, this →MakeRefworks← bookmarklet will convert all of HubMed's 'Citation' links into 'Send to Refworks' links, that can be used to export citations to Refworks.
To use the bookmarklet, add it to your bookmarks (either drag it to your browser's bookmarks toolbar or right-click the link and select 'Bookmark This Link') then click it when on a page of HubMed's search results or abstract display pages.