MLA

Saarinen, Eero, 1910-1961. Interiors. Box 154, folder 437. undated. https://collections.library.yale.edu/catalog/10017388.

APA, 6th edition

Saarinen, Eero, 1910-1961. (["Box 154, folder 437"])(undated)[Interiors]. https://collections.library.yale.edu/catalog/10017388.