Packard, A. Guide to the study of insects and a treatise on those injurious and beneficial to crops for the use of colleges, farm-schools, and agriculturists. Henry Holt.
芝加哥风格引文Packard, A.S. Guide to the Study of Insects and a Treatise on Those Injurious and Beneficial to Crops for the Use of Colleges, Farm-schools, and Agriculturists. New York: Henry Holt.
MLA引文Packard, A.S. Guide to the Study of Insects and a Treatise on Those Injurious and Beneficial to Crops for the Use of Colleges, Farm-schools, and Agriculturists. Henry Holt.
警告：这些引文格式不一定是100％准确.