ProQuest (Firm). (2011). Main aggregates. OECD.
芝加哥风格引文ProQuest (Firm). Main Aggregates. [Paris, France]: OECD, 2011.
MLA引文ProQuest (Firm). Main Aggregates. OECD, 2011.
警告:这些引文格式不一定是100%准确.
ProQuest (Firm). (2011). Main aggregates. OECD.
芝加哥风格引文ProQuest (Firm). Main Aggregates. [Paris, France]: OECD, 2011.
MLA引文ProQuest (Firm). Main Aggregates. OECD, 2011.