MLA

Simpson, Randolph Linsly, 1927-1992. Unknown photographer "Comic and Groups." Stereograph, light yellow card. Box 13, folder 691. circa 1885. https://collections.library.yale.edu/catalog/32582721.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 13, folder 691"])(circa 1885)[Unknown photographer "Comic and Groups." Stereograph, light yellow card]. https://collections.library.yale.edu/catalog/32582721.