MLA

Clark, William, 1770-1838. July 4, 1804. A description of country, list of French in pirogue, large boat, bow men. Box 1, folder 26. 1803-1805. https://collections.library.yale.edu/catalog/2002967.

APA, 6th edition

Clark, William, 1770-1838. (["Box 1, folder 26"])(1803-1805)[July 4, 1804. A description of country, list of French in pirogue, large boat, bow men]. https://collections.library.yale.edu/catalog/2002967.