Cite

Longfellow, Henry Wadsworth to JJA

MLA

Audubon, John James, 1785-1851. Longfellow, Henry Wadsworth to JJA. Box 5, folder 232. 1840 Sep 12. https://collections.library.yale.edu/catalog/17281597.

APA, 6th edition

Audubon, John James, 1785-1851. (["Box 5, folder 232"])(1840 Sep 12)[Longfellow, Henry Wadsworth to JJA]. https://collections.library.yale.edu/catalog/17281597.