Stephenson, S. M. (2002). Non-Tariff Barriers and the Telecommunications Sector.
Cita Chicago (17th ed.)Stephenson, Sherry M. Non-Tariff Barriers and the Telecommunications Sector. Hamburg, 2002.
Cita MLA (8th ed.)Stephenson, Sherry M. Non-Tariff Barriers and the Telecommunications Sector. 2002.
Atenció: Aquestes cites poden no estar 100% correctes.