MLA

Saarinen, Eero, 1910-1961. Exteriors; interiors. Box 411, folder 1150. undated. https://collections.library.yale.edu/catalog/10017885.

APA, 6th edition

Saarinen, Eero, 1910-1961. (["Box 411, folder 1150"])(undated)[Exteriors; interiors]. https://collections.library.yale.edu/catalog/10017885.