Não informado. (2022). USDA Forest Service Research Paper PSW. U.S. Forest Service.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. USDA Forest Service Research Paper PSW. Berkeley, Calif: U.S. Forest Service, 2022.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. USDA Forest Service Research Paper PSW. U.S. Forest Service, 2022.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.