hi! i just commissioned someone on da to make a layout image and noticed she credits sxc.hu, a free image provider. is this an appropriate image credit for hp? 

sxc.hu no longer /technically/ exists - it's now freeimages.com
but besides that she would have to credit the actual user themselves in the vein of: freeimages.com/photographer/deboer-48224 for this image (link)

That's one of the recourses we talk about here: http://horsephenomena.com/help/other_info.php#stockandcredits

But clearly, we need to update the guide a bit, haha.

Sxc, I will admit, has always made me scratch my head. I have the reference for mod stuff but I just kinda... Avoid messing with it with my own art. 

Link Tree

Thank you so much!