Cite

Kiui, TSezar' Antonovich to Elena Grigorevna

MLA

Korvin-Piotrovskiĭ, Vladimir Lʹvovich, 1891-1966. Kiui, TSezar' Antonovich to Elena Grigorevna. Box 2, folder 87. 1920, undated. https://collections.library.yale.edu/catalog/17278859.

APA, 6th edition

Korvin-Piotrovskiĭ, Vladimir Lʹvovich, 1891-1966. (["Box 2, folder 87"])(1920, undated)[Kiui, TSezar' Antonovich to Elena Grigorevna]. https://collections.library.yale.edu/catalog/17278859.