MLA

Saarinen, Eero, 1910-1961. Cafeteria mural by Stuart Davis. Box 674, folder 61. undated. https://collections.library.yale.edu/catalog/10019086.

APA, 6th edition

Saarinen, Eero, 1910-1961. (["Box 674, folder 61"])(undated)[Cafeteria mural by Stuart Davis]. https://collections.library.yale.edu/catalog/10019086.