MLA

Pryce-Jones, Alan, 1908-2000. Connolly, Cyril. Box 7, folder 293. 1941-46, n.d.. https://collections.library.yale.edu/catalog/17341188.

APA, 6th edition

Pryce-Jones, Alan, 1908-2000. (["Box 7, folder 293"])(1941-46, n.d.)[Connolly, Cyril]. https://collections.library.yale.edu/catalog/17341188.