Cita APA (7a ed.)

Organisation for Economic Co-operation and Development Staff. (2001). Portugal, Belgium. OECD Publications Services.

Cita Chicago Style (17a ed.)

Organisation for Economic Co-operation and Development Staff. Portugal, Belgium. Paris, France: OECD Publications Services, 2001.

Cita MLA (9a ed.)

Organisation for Economic Co-operation and Development Staff. Portugal, Belgium. OECD Publications Services, 2001.