99 Unspoken Rules of Social Etiquette: Are you rude and don't even know it?
Modern Manners: Tools to Take You to the Top
The Etiquette of Kindness -- It's Not Just About the Right Fork!: Skills and Courtesies for Our Time; A Manual for Young People (and Others!)
Style: The Modern Lady's Guide to Elegance and Charm
Emily Post's Etiquette, 18