I do agree with Laurie.  The main reason I credit vendors whose things I used is because I think someone else may want to know what it is and where it came from and want to use it too. 
I guess I could just put a notice at the bottom and tell e'one to contact me and ask if they need to  know about  something.   

 

“For those who believe, no proof is necessary. For those who don't believe, no proof is possible.”

[Stuart Chase]