MLA

Josephson, Matthew, 1899-1978. "Europe Revisited". Box 13, folder 334-35. 1921-1978. https://collections.library.yale.edu/catalog/10544125.

APA, 6th edition

Josephson, Matthew, 1899-1978. (["Box 13, folder 334-35"])(1921-1978)["Europe Revisited"]. https://collections.library.yale.edu/catalog/10544125.