title: Choosing and using an ad agency.
authors: H
authors: H
authors: Sumption
mesh_terms: D000329:Advertising; D003284:Contract Services / Q000592:standards*; D003657:Decision Making; D005653:Fund Raising / Q000458:organization & administration*; D006788:Hospitals, Voluntary / Q000191:economics* / Q000458:organization & administration; D014481:United States