How to know the butterflies;
a manual of the butterflies of the eastern United States,
by John Henry Comstock...and Anna Botsford Comstock...with forty-five full-page plates from life reproducing the insects in natural colors.
APA Citation
Comstock, J. Henry., Comstock, A. Botsford. (1904). How to know the butterflies: a manual of the butterflies of the eastern United States. New York: D. Appleton.
MLA Citation
Comstock, John Henry, 1849-1931, and Anna Botsford Comstock. How to Know the Butterflies: a Manual of the Butterflies of the Eastern United States. New York: D. Appleton, 1904.
Warning: These citations may not always be complete (especially for serials).