You really don't need to put contact information on the resume itself - the companies you're applying to won't call your references unless you're one of the very top candidates, anyway, in which case they will have had a separate interview with you and had the chance to ask you to fill out an additional reference form if necessary. If you're looking for a retail job, though, be aware that only 10% of employers even check the references in the first place. (I got this statistic from a former boss, who was the owner of a local bookstore chain. He was one of the ones who didn't check.) So even if they do ask to check your references, having two of the six references should be plenty! They just want to make sure that you're not making up your whole work history, and that you have some experience somewhere.