Organisation for Economic Co-operation and Development & ProQuest (Firm). (2006). Milan, Italy. OECD.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रOrganisation for Economic Co-operation and Development और ProQuest (Firm). Milan, Italy. Paris: OECD, 2006.
एमएलए (9वां संस्करण) प्रशस्ति पत्रOrganisation for Economic Co-operation and Development और ProQuest (Firm). Milan, Italy. OECD, 2006.
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