References when my manager was laid off too after 7 years as a dental hygienist

The company closed and I am not sure how to reach former colleagues. I worked as a dental hygienist before this. I have one former client who liked my work. Who did you use?

I kept a note of my results so my references could be specific. They appreciated it.

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