Não informado. (2022). US Forest Service Resource Bulletin PNW. Pacific Northwest Forest and Range Experiment Station.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. US Forest Service Resource Bulletin PNW. Portland, Ore: Pacific Northwest Forest and Range Experiment Station, 2022.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. US Forest Service Resource Bulletin PNW. Pacific Northwest Forest and Range Experiment Station, 2022.
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