Field book of western wild flowers,
by Margaret Armstrong in collaboration with J. J. Thornber ... with five hundred illustrations in black and white, and forty-eight plates in color drawn from nature by the author.
APA Citation
Armstrong, M., Thornber, J. James. (1924). Field book of western wild flowers. New York: C. [I] P. Putnam's sons.
MLA Citation
Armstrong, Margaret, 1867-1944, and John James Thornber. Field Book of Western Wild Flowers. New York: C. [I] P. Putnam's sons, 1924.
Warning: These citations may not always be complete (especially for serials).