MLA

Audubon, John James, 1785-1851. Journal No. 5, transcript, manuscript. Box 8, folder 446. 1843 Aug 5-13. https://collections.library.yale.edu/catalog/2020118.

APA, 6th edition

Audubon, John James, 1785-1851. (["Box 8, folder 446"])(1843 Aug 5-13)[Journal No. 5, transcript, manuscript]. https://collections.library.yale.edu/catalog/2020118.