MLA

Gabo, Naum, 1890-1977. Bijenkorf Construction, Rotterdam. Box 31. 1954-1961, undated. https://collections.library.yale.edu/catalog/16634420.

APA, 6th edition

Gabo, Naum, 1890-1977. (["Box 31"])(1954-1961, undated)[Bijenkorf Construction, Rotterdam]. https://collections.library.yale.edu/catalog/16634420.