In our print Reference Collection:
Dictionary of International Trade
A Dictionary of International Trade Organizations and Agreements
Dictionary of Trade Policy Terms
Globalization: Encyclopedia of Trade, Labor, and Politics
The Oxford Encyclopedia of Economic History
The Princeton Encyclopedia of the World Economy
World Competitiveness Yearbook
World Directory of Trade Promotion Organizations and Other Trade Support Institutions
FITA: Really Useful Links for International Trade
The Federation of International Trade Associations maintains this excellent site that features links to sites by topic.
United Nations Conference on Trade and Development (UNCTAD)
UNCTAD's website includes a digital library and statistics.
World Bank: Trade and International Integration
This website of the World Bank provides access to data and publications relating to trade issues.