MLA

Archiquette, John, 1847-1923. Archiquette, Oscar to Bogle, Phyllis Winnifred Archiquette. Box 2, folder 43. 1970 October 10. https://collections.library.yale.edu/catalog/16715399.

APA, 6th edition

Archiquette, John, 1847-1923. (["Box 2, folder 43"])(1970 October 10)[Archiquette, Oscar to Bogle, Phyllis Winnifred Archiquette]. https://collections.library.yale.edu/catalog/16715399.