vavle cover or head is leaking oil?

What do you guys think. Do you think the vavle cover or head is leaking oil.
http://i241.photobucket.com/albums/f...8/P1010912.jpg
http://i241.photobucket.com/albums/f...8/P1010913.jpg
http://i241.photobucket.com/albums/f...8/P1010914.jpg
http://i241.photobucket.com/albums/f...8/P1010914.jpg
Thanks

Back of motor? Could also be the oil sending unit. Mine is starting to leak.

being that you are turbo charged, I would guess it could be leaking anywhere especially under boost. Valve covers leak real good if you have excessive blowby.