MLA

Huntington, Ellsworth, 1876-1947. Yale University:. Box 58, folder 2047. 1927. https://collections.library.yale.edu/catalog/32505737.

APA, 6th edition

Huntington, Ellsworth, 1876-1947. (["Box 58, folder 2047"])(1927)[Yale University:]. https://collections.library.yale.edu/catalog/32505737.