MLA

Stepun, Fedor, 1884-1965. Shor, Ol'ga Aleksandrovna. Box 32, folder 1066-1070. 1954-64. https://collections.library.yale.edu/catalog/9998617.

APA, 6th edition

Stepun, Fedor, 1884-1965. (["Box 32, folder 1066-1070"])(1954-64)[Shor, Ol'ga Aleksandrovna]. https://collections.library.yale.edu/catalog/9998617.