I'm currently writing a piece of dialogue involving a question followed by a tag. It's been so long since I sat down and worked on any piece that I've forgotten some rules on punctuation. In the following sentence do I need to insert a comma or is it not needed. If so does it go inside the quotation or outside? I referred to Cogitos mechanics of dialogue post but I'm still having trouble. Here's the sentence: "Hey, you up?", a creaky voice said.