Consult "The Writers Marketplace". Most public libraries have a copy of this book. Among other things, it has a list of publishers and their requirements.
Michael doesn't know what he's talking about. Self-publishing is not the way to go; unless you only want a few copies of the book. Bookstores do not accept books that have been self-published, because ANYONE can selfpublish. That being said, the majority of it is junk that was rejected from actual publishers.
Research the best publishers for your genre; some only accept certain genres and styles. Find the best publisher for your manuscript.
I think you also need to research the process of publication some more before you go about this; you' certainly benefit from it.