Everything You Always Wanted To Know About Hat Etiquette - Bikini Junkie
Modern Hat Etiquette for Men and Women, by American Hat Makers
The 12 Golden Rules of Wedding hat Etiquette you Need to Know
Modern Etiquette Consultancy - Ladies Hat Etiquette For women, dress hats do not need to be removed when indoors. This rule of etiquette has developed out of the role of women's hats
Hat etiquette for men - Emma.Fashion
Men's Hats Are Back! - I Am Alpha M
Wearing Hats Indoors - Hat Etiquette - He Spoke Style
Hat Etiquette: - The New York Times
Hat etiquette: Should you still take your hat off at dinner, during the national anthem, etc.?