Cite

Common Grackle (Purple Grackle), pl. no. 390

MLA

Audubon, John James, 1785-1851. Common Grackle (Purple Grackle), pl. no. 390. 1981. https://collections.library.yale.edu/catalog/2000199.

APA, 6th edition

Audubon, John James, 1785-1851. (1981)[Common Grackle (Purple Grackle), pl. no. 390]. https://collections.library.yale.edu/catalog/2000199.