APA (7e ed.) Bronvermelding

Packard, A. (1880). Guide to insects: And a treatise on those injurious and beneficial to crops for the use of colleges, farm schools and agriculturist (7th edition.). Henry Holt and Company.

Chicago (17e ed.) Bronvermelding

Packard, A.S. Guide to Insects: And a Treatise on Those Injurious and Beneficial to Crops for the Use of Colleges, Farm Schools and Agriculturist. 7th edition. New Delhi: Henry Holt and Company, 1880.

MLA (9e ed.) Bronvermelding

Packard, A.S. Guide to Insects: And a Treatise on Those Injurious and Beneficial to Crops for the Use of Colleges, Farm Schools and Agriculturist. 7th edition. Henry Holt and Company, 1880.