MLA

Saarinen, Eero, 1910-1961. Interiors. Box 163, folder 469. 1955, undated. https://collections.library.yale.edu/catalog/10017059.

APA, 6th edition

Saarinen, Eero, 1910-1961. (["Box 163, folder 469"])(1955, undated)[Interiors]. https://collections.library.yale.edu/catalog/10017059.