APA
Organisation for Economic Co-operation and Development Staff. (2009). OECD Factbook 2009: Economic, Environmental and Social Statistics. OECD.
https://doi.org/10.1787/factbook-2009-en
사이트
https://www.oecd-ilibrary.org/economics/oecd-factbook-2009_factbook-2009-en
다운로드