MLA

Saarinen, Eero, 1910-1961. Architectural mylars. Box 604 | Box 605. undated. https://collections.library.yale.edu/catalog/10020289.

APA, 6th edition

Saarinen, Eero, 1910-1961. (["Box 604 | Box 605"])(undated)[Architectural mylars]. https://collections.library.yale.edu/catalog/10020289.