Organisation for Economic Co-operation and Development & ProQuest (Firm). (2011). Improving lower secondary schools in Norway, 2011. OECD.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रOrganisation for Economic Co-operation and Development और ProQuest (Firm). Improving Lower Secondary Schools in Norway, 2011. [Paris]: OECD, 2011.
एमएलए (9वां संस्करण) प्रशस्ति पत्रOrganisation for Economic Co-operation and Development और ProQuest (Firm). Improving Lower Secondary Schools in Norway, 2011. OECD, 2011.
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