MLA

Saarinen, Eero, 1910-1961. Site plan sketches. Box 674, folder 74. undated. https://collections.library.yale.edu/catalog/10021523.

APA, 6th edition

Saarinen, Eero, 1910-1961. (["Box 674, folder 74"])(undated)[Site plan sketches]. https://collections.library.yale.edu/catalog/10021523.