Author link in plugin- Acceptable?

Hey People.
I hope this is nearly the right place to stick this, have tried to find an answer elsewhere but cant at all, maybe its right under my nose!

I have written a WP Widget, which I intend to upload to WordPress in the coming weeks, my question is, I have seen some widgets with a visible author link in them and others without. Is it acceptable to have a small link going back to my website?

I dont mean sponsored links or any spam, just a link to my own personal design site. After all, a few more links never hurt anyone.

I was going to use the widgets CSS and make it extra, extra small at the bottom, I just wanted to know if thats ok, or I shouldnt do it.

Thanks!