Abrams, L. R., & Ferris, R. S. (1923). An illustrated flora of the Pacific States: Washington, Oregon, and California. Stanford University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAbrams, Le Roy, और Roxana S. Ferris. An Illustrated Flora of the Pacific States: Washington, Oregon, and California. Stanford University: Stanford University Press, 1923.
एमएलए (8वां संस्करण) प्रशस्ति पत्रAbrams, Le Roy, और Roxana S. Ferris. An Illustrated Flora of the Pacific States: Washington, Oregon, and California. Stanford University Press, 1923.
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