MLA

Saarinen, Eero, 1910-1961. Architectural mylars. Box 506 | Box 505. undated. https://collections.library.yale.edu/catalog/10187419.

APA, 6th edition

Saarinen, Eero, 1910-1961. (["Box 506 | Box 505"])(undated)[Architectural mylars]. https://collections.library.yale.edu/catalog/10187419.