They actually have a post about that on their blog: http://blog.thenounproject.com/post/7310229014/how-to-properly-attribute-cc-by-a-guest-blog-post-by http://

They actually have a post about that on their blog: http://blog.thenounproject.com/post/7310229014/how-to-properly-attribute-cc-by-a-guest-blog-post-by http://blog.thenounproject.com/post/7310229014/how-to-proper... "When using a CC Attribution work created by us, please attribute it to The Noun Project and include a link whenever possible." (the post goes into more detail for CC-BY in general as well)