Não informado. (1951). Cooperative economic insect report. U.S. Department of Agriculture, Agricultural Research Service, Plant Protection Division.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Cooperative Economic Insect Report. Washington: U.S. Department of Agriculture, Agricultural Research Service, Plant Protection Division, 1951.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Cooperative Economic Insect Report. U.S. Department of Agriculture, Agricultural Research Service, Plant Protection Division, 1951.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.