Is the quesiton out of place here? Is this more legal than workplace?
Absolutely not, it is in fact a Workplace related question. It could be more legal if you rephrase it in such way, but right now the single line it contains is about a workplace situation and is on-topic.
How can I improve this or why is this wrong?
First, the comment you obtained indicating it is "too simple" I think referred to the fact that it was a plain question: no details, almost no context. Not to the fact that it is not worthy of a question.
You post was closed because it did not contain enough information to give you a sound and thoughtful answer. As the Notice indicated "Please clarify your specific problem or add additional details to highlight exactly what you need".
I suggest you try including more details to your question. Why do you want to ask such reference, what is the situation between your company and that other, what problems are forcing you to take another approach, or to hesitate about it, rather than just asking for the reference.
These are just some examples I can think of, but you can surely think of more so you have enough information to make an effective post with all relevant information needed to answer it. Consider editing it, and pinging me here when you do, so we can see if other support the idea of reopening.