MLA

Osborn, James M. (James Marshall), 1906-1976. Copeland, Thomas Wellsted, 1907-1979. Box 17, folder 357-360. 1947-56. https://collections.library.yale.edu/catalog/16825860.

APA, 6th edition

Osborn, James M. (James Marshall), 1906-1976. (["Box 17, folder 357-360"])(1947-56)[Copeland, Thomas Wellsted, 1907-1979]. https://collections.library.yale.edu/catalog/16825860.