Hayes, D. W., & Garrison, G. A. (1960). Key to important woody plants of eastern Oregon and Washington. U.S. Govt. Print. Off..
Style de citation Chicago (17e éd.)Hayes, Doris W., et George A. Garrison. Key to Important Woody Plants of Eastern Oregon and Washington. Washington: U.S. Govt. Print. Off., 1960.
Style de citation MLA (8e éd.)Hayes, Doris W., et George A. Garrison. Key to Important Woody Plants of Eastern Oregon and Washington. U.S. Govt. Print. Off., 1960.
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