MLA

Simpson, Randolph Linsly, 1927-1992. Unknown Photographer "America Illustrated-Tropical Series." Stereograph, yellow card. Box 13, folder 700. circa 1870. https://collections.library.yale.edu/catalog/32582739.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 13, folder 700"])(circa 1870)[Unknown Photographer "America Illustrated-Tropical Series." Stereograph, yellow card]. https://collections.library.yale.edu/catalog/32582739.