The best sources of information on apparel sourcing are:
The Clothesource Handbook of Apparel Sourcing, 2008
The Clothesource Guide to Trade Rules
Look at
Clothesource commentaries on the day's sourcing issues
And here are some basic guides we've given audiences around the world:
First reaction to quota abolition: London 2005
Second reaction: Las Vegas 2005
The effect of protection: Thessalonica 2006