MLA

Brodsky, Joseph, 1940-1996. Solzhenitsyn, Aleksandr. Box 14, folder 372. 1977. https://collections.library.yale.edu/catalog/17305991.

APA, 6th edition

Brodsky, Joseph, 1940-1996. (["Box 14, folder 372"])(1977)[Solzhenitsyn, Aleksandr]. https://collections.library.yale.edu/catalog/17305991.