Noreland, J. (2008). Modal split in the inland transport of the EU: Freight and passenger transport up to 2006. Statistics in focus: Transport.
Cita Chicago (17th ed.)Noreland, Jonas. "Modal Split in the Inland Transport of the EU: Freight and Passenger Transport Up to 2006." Statistics in Focus: Transport 2008.
Cita MLA (8th ed.)Noreland, Jonas. "Modal Split in the Inland Transport of the EU: Freight and Passenger Transport Up to 2006." Statistics in Focus: Transport, 2008.
Atenció: Aquestes cites poden no estar 100% correctes.