See it here or elsewhere, like it, find the pattern! Or try to figure it out if pattern not available.
I have surfed mfgr sites for free patterns but find they are all about selling 15 kinds of fabric from one line, showcasing the fabric, and not always really good patterns.
Kauffman and Windham do have good patterns.
Haven't bought many books because I feel like there's a lot of stuff in them I will never use