APA (7th ed.) Citation

Armstrong, M., & Thornber, J. J. (1915). Field book of western wild flowers. C.[!] P. Putnam's sons.

Chicago Style (17th ed.) Citation

Armstrong, Margaret, and J. J. Thornber. Field Book of Western Wild Flowers. New York, London: C.[!] P. Putnam's sons, 1915.

MLA (9th ed.) Citation

Armstrong, Margaret, and J. J. Thornber. Field Book of Western Wild Flowers. C.[!] P. Putnam's sons, 1915.