Cita APA (7th ed.)

Organisation for Economic Co-operation and Development & ProQuest (Firm). (2009). Poland. Organisation for Economic Co-operation and Development.

Cita Chicago (17th ed.)

Organisation for Economic Co-operation and Development i ProQuest (Firm). Poland. Paris: Organisation for Economic Co-operation and Development, 2009.

Cita MLA (9th ed.)

Organisation for Economic Co-operation and Development i ProQuest (Firm). Poland. Organisation for Economic Co-operation and Development, 2009.