References when my manager was laid off too - first time posting

My manager was laid off too and I am unsure who to use as a reference. I would rather hear the honest version than the polite one. I have one former client who liked my work. How do you ask politely?

A client reference worked well for me. It shows you deliver outside the company too.

Ask former colleagues and supervisors in a short message and give them a summary of the job you are applying for.