It seems to me if you have enough technical skill to get here and post your question, then you have what it takes to do some research on the topic and weed through it yourself, hmmmm?
I am happy to help unstick someone sincerely stuck in thier homework or project, but not do it for them.
Here are a few angles for consideration:
How dressing etiquette has changed over time
How dressing etiquette differs in different countries
What significant role dressing etiquette plays in (fill in the blank)
How dressing etiquette does or does not follow fashion
Get your thinking cap on!