MLA

Berberova, N. (Nina), 1901-1993. Kerensky, Therese. Box 45, folder 1058. 1946. https://collections.library.yale.edu/catalog/16688058.

APA, 6th edition

Berberova, N. (Nina), 1901-1993. (["Box 45, folder 1058"])(1946)[Kerensky, Therese]. https://collections.library.yale.edu/catalog/16688058.