Cite

Black, Adam to JJA

MLA

Audubon, John James, 1785-1851. Black, Adam to JJA. Box 3, folder 103. 1831. https://collections.library.yale.edu/catalog/17281589.

APA, 6th edition

Audubon, John James, 1785-1851. (["Box 3, folder 103"])(1831)[Black, Adam to JJA]. https://collections.library.yale.edu/catalog/17281589.