United Nations (UNCTAD). (1991). Handbook of international trade and development statistics, (1988-onwards). the author.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnited Nations (UNCTAD). Handbook of International Trade and Development Statistics, (1988-onwards). the author, 1991.
एमएलए (9वां संस्करण) प्रशस्ति पत्रUnited Nations (UNCTAD). Handbook of International Trade and Development Statistics, (1988-onwards). the author, 1991.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.