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शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रThe Environmental Performance of Public Procurement: Issues of Policy Coherence. Paris, France: OECD, 2003.
एमएलए (9वां संस्करण) प्रशस्ति पत्रThe Environmental Performance of Public Procurement: Issues of Policy Coherence. OECD, 2003.
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