United Nations Economic Commission for Europe. (1980). Trends in Airborne Equipment for Agriculture and Other Areas. ELSEVIER.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnited Nations Economic Commission for Europe. Trends in Airborne Equipment for Agriculture and Other Areas. ELSEVIER, 1980.
एमएलए (8वां संस्करण) प्रशस्ति पत्रUnited Nations Economic Commission for Europe. Trends in Airborne Equipment for Agriculture and Other Areas. ELSEVIER, 1980.
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