Berlin, Pavel A.
MLA
Berberova, N. (Nina), 1901-1993. Berlin, Pavel A.. Box 4, folder 64. 1943 Apr 4. https://collections.library.yale.edu/catalog/16687985.
APA, 6th edition
Berberova, N. (Nina), 1901-1993. (["Box 4, folder 64"])(1943 Apr 4)[Berlin, Pavel A.]. https://collections.library.yale.edu/catalog/16687985.