McDougall, W. B. (1962). Seed plants of Wupatki and Sunset Crater National Monuments: With keys for the identification of species. Northern Arizona Society of Science and Art.
Chicago Style (17th ed.) CitationMcDougall, W. B. Seed Plants of Wupatki and Sunset Crater National Monuments: With Keys for the Identification of Species. Flagstaff: Northern Arizona Society of Science and Art, 1962.
MLA (9th ed.) CitationMcDougall, W. B. Seed Plants of Wupatki and Sunset Crater National Monuments: With Keys for the Identification of Species. Northern Arizona Society of Science and Art, 1962.
Warning: These citations may not always be 100% accurate.