While “How to Talk So Kids Will Listen & Listen So Kids Will Talk” does not focus specifically on etiquette, it does cover aspects of polite communication and respectful behavior in interactions between parents and children. In that sense, it indirectly teaches etiquette for both adults and children.
The Dewey Decimal numbers related to etiquette for adults and children are:
395: Etiquette (general etiquette for adults)
395.1: Children’s etiquette (etiquette specifically for children)