Não informado. (1955). Forest pest leaflet. U.S. Department of Agriculture, Forest Service.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Forest Pest Leaflet. Washington: U.S. Department of Agriculture, Forest Service, 1955.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Forest Pest Leaflet. U.S. Department of Agriculture, Forest Service, 1955.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.