MLA

Simpson, Randolph Linsly, 1927-1992. Keystone View Company, Meadville, PA; New York, NY; Portland, OR; London, ENG "85 - 6952. Gathering Peaches, Delaware." Stereograph, grey card. Box 13, folder 627. circa 1896. https://collections.library.yale.edu/catalog/32582589.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 13, folder 627"])(circa 1896)[Keystone View Company, Meadville, PA; New York, NY; Portland, OR; London, ENG "85 - 6952. Gathering Peaches, Delaware." Stereograph, grey card]. https://collections.library.yale.edu/catalog/32582589.