MLA

McKay, Claude, 1890-1948. Reviews. Box 9, folder 311. n.d.. https://collections.library.yale.edu/catalog/16742366.

APA, 6th edition

McKay, Claude, 1890-1948. (["Box 9, folder 311"])(n.d.)[Reviews]. https://collections.library.yale.edu/catalog/16742366.