MLA

Audubon, John James, 1785-1851. Audubon, John James. Box 1, folder 3-10. 1827-46, n.d.. https://collections.library.yale.edu/catalog/16445197.

APA, 6th edition

Audubon, John James, 1785-1851. (["Box 1, folder 3-10"])(1827-46, n.d.)[Audubon, John James]. https://collections.library.yale.edu/catalog/16445197.