(2001). Research and development expenditure in industry 1987-1999. OECD.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रResearch and Development Expenditure in Industry 1987-1999. Paris, Cedex, France: OECD, 2001.
एमएलए (9वां संस्करण) प्रशस्ति पत्रResearch and Development Expenditure in Industry 1987-1999. OECD, 2001.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.