Organisation for Economic Co-operation and Development. (2002). United Kingdom: Challenges at the cutting edge. Organization for Economic Co-operation and Development.
Cita Chicago (17th ed.)Organisation for Economic Co-operation and Development. United Kingdom: Challenges at the Cutting Edge. Paris, France: Organization for Economic Co-operation and Development, 2002.
Cita MLA (9th ed.)Organisation for Economic Co-operation and Development. United Kingdom: Challenges at the Cutting Edge. Organization for Economic Co-operation and Development, 2002.
Atenció: Aquestes cites poden no estar 100% correctes.