MLA

Gabo, Naum, 1890-1977. The Circle. Box 32. 1939-1980. https://collections.library.yale.edu/catalog/17170361.

APA, 6th edition

Gabo, Naum, 1890-1977. (["Box 32"])(1939-1980)[The Circle]. https://collections.library.yale.edu/catalog/17170361.