MLA

Simpson, Randolph Linsly, 1927-1992. Keystone View Company, Meadville, PA; New York, NY; Chicago, IL; London, ENG "115 - 16738. Mining Phosphate and Loading Cars Near Columbia, Tenn." Stereograph, grey card. Box 13, folder 625. circa 1896. https://collections.library.yale.edu/catalog/32582583.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 13, folder 625"])(circa 1896)[Keystone View Company, Meadville, PA; New York, NY; Chicago, IL; London, ENG "115 - 16738. Mining Phosphate and Loading Cars Near Columbia, Tenn." Stereograph, grey card]. https://collections.library.yale.edu/catalog/32582583.