Christopher Blackwell and Amy Hackney Blackwell describe with examples a digital library infrastructure that affords canonical citation for 'quoting' images, useful for creating commentaries, arguments, and teaching tools. <a href="/issue67">issue67</a> July 2011 <a href="/category/article-type/feature-article">feature article</a> <a href="/taxonomy/term/5/author-info">amy hackney blackwell</a>, <a href="/taxonomy/term/4/author-info">christopher blackwell</a>