MLA

Audubon, John James, 1785-1851. Birds of America : from drawings made during a residence of upwards of twenty-five years in the United States and its territories / by John James Audubon .... [1827?]. https://collections.library.yale.edu/catalog/17383894.

APA, 6th edition

Audubon, John James, 1785-1851. ([1827?])[Birds of America : from drawings made during a residence of upwards of twenty-five years in the United States and its territories / by John James Audubon ...]. https://collections.library.yale.edu/catalog/17383894.