MLA

Saarinen, Eero, 1910-1961. Construction site. Box 542, folder 1461. undated. https://collections.library.yale.edu/catalog/10017741.

APA, 6th edition

Saarinen, Eero, 1910-1961. (["Box 542, folder 1461"])(undated)[Construction site]. https://collections.library.yale.edu/catalog/10017741.