MLA

Simpson, Randolph Linsly, 1927-1992. Kilburn Brothers, Littleton, NH "885. Cabin Home, Petersburg, Va." Stereograph, yellow card. Box 13, folder 638. circa 1890. https://collections.library.yale.edu/catalog/32582610.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 13, folder 638"])(circa 1890)[Kilburn Brothers, Littleton, NH "885. Cabin Home, Petersburg, Va." Stereograph, yellow card]. https://collections.library.yale.edu/catalog/32582610.