This is a test of commonsense. Complete the next sentence:

How to include references on a resume
Make sure your references know that you will be using them as references.
Do not give out their contact information to potential employers unless they give you their explicit permission.
When asking your references for permission to give out their contact information, make sure that they plan on giving a positive recommendation.
It's also a good idea to ask your references how they would prefer to be contacted (ex. Email, work phone, cell phone, etc.