Cita APA (7th ed.)

Organisation for Economic Co-operation and Development & ProQuest (Firm). (2011). Portugal 2011. OCDE.

Cita Chicago (17th ed.)

Organisation for Economic Co-operation and Development i ProQuest (Firm). Portugal 2011. [Paris]: OCDE, 2011.

Cita MLA (9th ed.)

Organisation for Economic Co-operation and Development i ProQuest (Firm). Portugal 2011. OCDE, 2011.