DoverPictura is closing their site on January 31, 2017.  I have purchased and used, with modifications, many of their royalty free images as elements in my designs.  Currently I use a reference to DoverPictura TOU in my notes to reviewer.  I was wondering how I should reference them after their closure?
 
Thanks,
Kati

I realize this original post is old, but it was never answered. I'm interested in knowing how to handle the closing of any site that provides images, not just the one mentioned in the post.