MLA

Saarinen, Eero, 1910-1961. Interiors. Box 566, folder 1543. undated. https://collections.library.yale.edu/catalog/10015749.

APA, 6th edition

Saarinen, Eero, 1910-1961. (["Box 566, folder 1543"])(undated)[Interiors]. https://collections.library.yale.edu/catalog/10015749.