Piper, C. V., & Beattie, R. K. (1901). The flora of the Palouse region: Containing descriptions of all the spermatophytes and pteridophytes known to grow wild in the area within 35 kilometers of Pullman, Washington. The Washington Agricultural College and School of Science.
Style de citation Chicago (17e éd.)Piper, Charles V., et R. Kent Beattie. The Flora of the Palouse Region: Containing Descriptions of All the Spermatophytes and Pteridophytes Known to Grow Wild in the Area Within 35 Kilometers of Pullman, Washington. Pullman: The Washington Agricultural College and School of Science, 1901.
Style de citation MLA (8e éd.)Piper, Charles V., et R. Kent Beattie. The Flora of the Palouse Region: Containing Descriptions of All the Spermatophytes and Pteridophytes Known to Grow Wild in the Area Within 35 Kilometers of Pullman, Washington. The Washington Agricultural College and School of Science, 1901.