Guide to the study of insects and a treatise on those injurious and beneficial to crops...
APA Citation
Packard, A. S. (Alpheus Spring). (1888). Guide to the study of insects and a treatise on those injurious and beneficial to crops... Ed. 9. New York: Henry Holt and company.
MLA Citation
Packard, A. S. (Alpheus Spring), 1839-1905. Guide to the Study of Insects And a Treatise On Those Injurious And Beneficial to Crops... Ed. 9. New York: Henry Holt and company, 1888.
Warning: These citations may not always be complete (especially for serials).