MLA

Berberova, N. (Nina), 1901-1993. Radley, Philippe. Box 16, folder 463-465. 1962-92, n.d.. https://collections.library.yale.edu/catalog/32325146.

APA, 6th edition

Berberova, N. (Nina), 1901-1993. (["Box 16, folder 463-465"])(1962-92, n.d.)[Radley, Philippe]. https://collections.library.yale.edu/catalog/32325146.