The medias needed to enhance the admin page.

def _media(self):
        """
        The medias needed to enhance the admin page.
        """
        def static_url(url):
            return staticfiles_storage.url('zinnia_markitup/%s' % url)

        media = super(EntryAdminMarkItUpMixin, self).media

        media += Media(
            js=(static_url('js/jquery.min.js'),
                static_url('js/markitup/jquery.markitup.js'),
                static_url('js/markitup/sets/%s/set.js' % (
                    settings.MARKUP_LANGUAGE)),
                reverse('admin:zinnia_entry_markitup')),
            css={'all': (
                static_url('js/markitup/skins/django/style.css'),
                static_url('js/markitup/sets/%s/style.css' % (
                    settings.MARKUP_LANGUAGE)))}
        )
        return media