Northey, Margot Impact : a guide to business communication / Northey, Margot ,Joan McKibbin - 7th ed - Toronto : Prentice-Hill, 2008 - 264 p : ill ISBN: 9780132385688 / 2250.00 Subjects--Topical Terms: Business communication.Commercial correspondence LC Class. No.: HF5718 / N874 I4 2008