Here's your very legal answer.....
It is not copyright infringement if it is for your own personal use. You do not need to give credit for any designs or patterns that you use for any quilts you make if it's for yourself or gifts. In the digital age we have started to confuse what copyright actually is and how it's violated.
Attribution actually not a requirement of copyright. The only time there is copyright infringement is when you are selling someone else quilt pattern and saying that it is your own. Even if you made quilts to sell from someone else's pattern you do not need to attribute the pattern to them.
Now.... let us see that quilt! I really want to make eyes at it and oooooh and aaaaahhhh over it.