<WILL EDIT LATER>
If on DeviantART, LINK BACK in the deviation description.
If NOT of DeviantART, STILL LINK BACK. Copy the URL, put it in the description.
If on a personal website, STILL LINK BACK. There is no reason for you to be unable to do this.
If not digital or on the web, a mention would be nice, but not necessary. Usage
Use my stock in violent/offensive art. I don't mind.
Use art containing my stock for prints.
Upload art containing my stock to facebook, myspace, sheezyart, etc. etc. etc. wherever. YOU DON'T HAVE TO ASK.
Use my stock or art containing my stock for website/blog/whatever layout.
You may not:
Use a stock photo to claim it is you.
Upload unedited stock and say it is art. It's not.
YES, you can use this stock for album art.
YES, you can use this stock for cards, websites, logos, etc