It sounds like the "Vintage Contemporaries" is a series name, just as Vintage Books is a part of Random House, the large publisher. In looking into Vintage Books, they are listed under the publishing firm of Random House, therefore, I would use Random House, New York as the publisher. You omit other publishers and locations. I would place a note in my letter to the evaluator explaining that you went with Random House becasue when looking up the publisher information for Vintage Books, it takes you to the Random House website.
edited by JanaBrailles on 5/11/2010