Now Bickham does allow that a story might have multiple points of view, although sometimes in a short story jumping around can make the piece seem disjointed.
"Changing viewpoint in a short story, where unity of effect is so crucial, usually makes the story seem disjointed. In a novel, there may be several viewpoints, but one must clearly dominate."He even goes so far as to say that 70% of a novel should be in a single viewpoint. I'm sure not everyone agrees with this, but I believe I do (with important exceptions). And it is similar to advice I received in a workshop with Russell Banks. Both another writer and I had work with shifting points of view. Mine was a short story that went back and forth between the boy and girl in a young couple. The other writer was working on a novel about sisters and did the same thing. In both cases the suggestion was to decide whose story was being told and stick with that person's point of view. I revised my story to do that and I do think it is stronger for having done it.
#12 Don't Forget Whose Story It Is