How important is it to include references in your CV?

it's very important, because it's help the employer to know other things about applicants that is not exsit in their CVs 

A reference page is very important. It makes you look more professional, organized and serious about your job search. It ultimately helps you present yourself in the best possible light and demonstrates that you are a candidate that should be taken seriously.

It is definitely recommended that every one have a prepared reference letter to give potential employers after they have met with them. The reason why you don't want to include your references with every resume sent is because you only want employers to call references after they have had a chance to meet with you and you have decided that you are interested in their position.

it varies from one employer to another. Often references play a critical role in your employment whereas some companies do not give much importance to references.