MLA

Saarinen, Eero, 1910-1961. Sketches. Box 183, folder 570. 1936-1989. https://collections.library.yale.edu/catalog/10020244.

APA, 6th edition

Saarinen, Eero, 1910-1961. (["Box 183, folder 570"])(1936-1989)[Sketches]. https://collections.library.yale.edu/catalog/10020244.