MLA

Simpson, Randolph Linsly, 1927-1992. Underwood & Underwood, New York & Ottawa, KS "13928 -- Sugar cane on a negro farmer's land, South Carolina." Stereograph, grey card. Box 13, folder 667. undated. https://collections.library.yale.edu/catalog/32582667.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 13, folder 667"])(undated)[Underwood & Underwood, New York & Ottawa, KS "13928 -- Sugar cane on a negro farmer's land, South Carolina." Stereograph, grey card]. https://collections.library.yale.edu/catalog/32582667.