MLA

Brodsky, Joseph, 1940-1996, Shults, Sergei. Shults, Sergei. Box 14 | Folder 368. 1988-1989. https://collections.library.yale.edu/catalog/17305990.

APA, 6th edition

Brodsky, Joseph, 1940-1996, & Shults, Sergei. (["Box 14 | Folder 368"])(1988-1989)[Shults, Sergei]. https://collections.library.yale.edu/catalog/17305990.