Armstrong, M., & Thornber, J. J. (2014). Field book of western wild flowers: The ultimate guide to flowers growing west of the Rocky Mountains. Skyhorse Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रArmstrong, Margaret, और J. J. Thornber. Field Book of Western Wild Flowers: The Ultimate Guide to Flowers Growing West of the Rocky Mountains. New York, NY: Skyhorse Publishing, 2014.
एमएलए (8वां संस्करण) प्रशस्ति पत्रArmstrong, Margaret, और J. J. Thornber. Field Book of Western Wild Flowers: The Ultimate Guide to Flowers Growing West of the Rocky Mountains. Skyhorse Publishing, 2014.
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