<http://schema.org/image>
<http://rack.3.mshcdn.com/media/ZgkyMDEyLzEyLzA0LzJkLzI1ZXNzZW50aWFsLmVXNi5qcGcKcAl0aHVtYgkxMjAweDYyNyMKZQlqcGc/647e7a5e/426/25-essential-social-media-resources-you-may-have-missed-1a8fa5fae1.jpg>
<http://mashable.com/2010/08/01/essential-resources-list/>