# How do I reference another question and is it OK to post a question as a comment/answer on another question that relates to that question.

A quick meta question, if I have a question that relates to another question, as this one does, do I post it as a comment? If not, how do I reference this question in my question? Thanks.

If you have a question that is related to another question, then post your question as a new question. You can then link to the related question and possibly say why they are related. You can simple paste the url of the related question into your question. It will automatically be formatted. For example

https://math.stackexchange.com/questions/140681/where-to-begin-with-foundations-of-mathematics

gives

Where to begin with foundations of mathematics

If your question is very similar, you should explain how your question is different (otherwise it might be closed as a duplicate.