MLA

McKay, Claude, 1890-1948. Book jacket. Box 12, folder 366. [1922]. https://collections.library.yale.edu/catalog/32268813.

APA, 6th edition

McKay, Claude, 1890-1948. (["Box 12, folder 366"])([1922])[Book jacket]. https://collections.library.yale.edu/catalog/32268813.