MLA

Korvin-Piotrovskiĭ, Vladimir Lʹvovich, 1891-1966. Loria, Arturo. Box 11, folder 229. 1928 June 12. https://collections.library.yale.edu/catalog/16601473.

APA, 6th edition

Korvin-Piotrovskiĭ, Vladimir Lʹvovich, 1891-1966. (["Box 11, folder 229"])(1928 June 12)[Loria, Arturo]. https://collections.library.yale.edu/catalog/16601473.