United Nations Conference on Trade and Development. Secretariat. (1969). Development of ports: Improvement of port operations and connected facilities. United Nations.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnited Nations Conference on Trade and Development. Secretariat. Development of Ports: Improvement of Port Operations and Connected Facilities. New York: United Nations, 1969.
एमएलए (9वां संस्करण) प्रशस्ति पत्रUnited Nations Conference on Trade and Development. Secretariat. Development of Ports: Improvement of Port Operations and Connected Facilities. United Nations, 1969.
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