McArdle, R. E., & Meyer, W. H. (1930). The yield of Douglas fir in the Pacific northwest. [U.S. Govt. print. off.].
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMcArdle, Richard E., और Walter H. Meyer. The Yield of Douglas Fir in the Pacific Northwest. Washington: [U.S. Govt. print. off.], 1930.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMcArdle, Richard E., और Walter H. Meyer. The Yield of Douglas Fir in the Pacific Northwest. [U.S. Govt. print. off.], 1930.
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