What kind of citation is needed for a whole paragraph? I'm writing a paper on The Beatles and in this paragraph I'm talking about the formation of the group. I got the info from their biographical book. So it's just a summarized version of a chapter. I have no idea how to state that this info is from a book?
You are paraphrasing the material, not quoting it.  (You summarized it.)  Put the citation at the end of the paragraph and add the source to your bibliography.