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. (1913). How to know the butterflies: a manual of the butterflies of the eastern United States. New York: D. Appleton and company.
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 and company, 1913.
Warning: These citations may not always be complete (especially for serials).