International Trade Centre UNCTAD/WTO & Commonwealth Secretariat. (1999). Business guide to the world trading system. International Trade Centre UNCTAD/WTO.
Cita Chicago (17th ed.)International Trade Centre UNCTAD/WTO i Commonwealth Secretariat. Business Guide to the World Trading System. Geneva: International Trade Centre UNCTAD/WTO, 1999.
Cita MLA (9th ed.)International Trade Centre UNCTAD/WTO i Commonwealth Secretariat. Business Guide to the World Trading System. International Trade Centre UNCTAD/WTO, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.