MLA

Saarinen, Eero, 1910-1961. Interiors. Box 221, folder 701. undated. https://collections.library.yale.edu/catalog/10017410.

APA, 6th edition

Saarinen, Eero, 1910-1961. (["Box 221, folder 701"])(undated)[Interiors]. https://collections.library.yale.edu/catalog/10017410.