Previously in HTML5 it is was not conforming to include citations within
blockquoteelements. Now it is, as long as the citation content is within a
footerelement. Citations inside
blockquoteelements are a common markup pattern (data indicates approximately 60% of
blockquoteelements include citations), the change to the HTML spec acknowledges this and provides semantic mechanisms to differentiate quoted content from citations. Steve Faulkner
Couldn’t agree more, that’s how I use them!