How to give attribution for answers?

Question

I've used some answers here to help make figures and do other things in documents I've created.

To make the question specific, consider this question - drawing oddly shaped nodes to contain existing nodes in tikz which will affect a figure I'll be publishing soon.

Now the question comes - how do I attribute this?

This question addresses attributing things, but the license has since been updated.

So my question is basically - do I just need a comment in .tex file saying

%this method comes from <url>

or do I need something in my bibliography?

or something directly where the figure appears in the text?

Answer 1

I put comments in my source code, and this in the Preface to the book where I thank folks for help.

Wizards at \url{tex.stackexchange.com} were always quick to answer \TeX{}nical questions.