MLA

Osborn, James M. (James Marshall), 1906-1976. Inglis, Helen. Box 40, folder 817. 1953-73. https://collections.library.yale.edu/catalog/16825861.

APA, 6th edition

Osborn, James M. (James Marshall), 1906-1976. (["Box 40, folder 817"])(1953-73)[Inglis, Helen]. https://collections.library.yale.edu/catalog/16825861.