MLA

Gulʹ, Roman, 1896-1986. Paustovskii, Konstantin. Box 82, folder 1960. 1963. https://collections.library.yale.edu/catalog/2057243.

APA, 6th edition

Gulʹ, Roman, 1896-1986. (["Box 82, folder 1960"])(1963)[Paustovskii, Konstantin]. https://collections.library.yale.edu/catalog/2057243.