If, as I assume is the case, it is your own work, I think you can upload it wherever you want. I �m not sure about how things work at Scribd.com, but here I would make a point to mention in your description of your worksheet that you have also uploaded it there, so that people don �t mistakenly think you have copied someone else �s work and report it.

 

Hope this helps and have a nice day,

Julia

 

I �d suggest you add in the wss description that it was also uploaded at... if you use a different nick / name at the other site. One of the advantages of using your own name on the internet is that everyone can see that the profile is yours wherever you upload your own work.