This attribution can take many forms such as the author's name published on the cover of a text, or within its pages attributed to a single piece, usually following the form of "STORY TITLE by Writer's Name". It may take the also take the form of an on-screen credit such as "Writer - Writer's Name". Following is a list of Doctor Who, Torchwood, The Sarah Jane Adventures, K9 and Company and K9 television stories and the writers who worked on each.