MLA

Simpson, Randolph Linsly, 1927-1992. Keystone View Company, Meadville, PA; New York, NY; Chicago, IL; London, ENG "P215 - V22091. Cars Loaded with Cotton Bales on Levee Near Cotton Growing District, Texas." Stereograph, grey card. Box 13, folder 631. circa 1915. https://collections.library.yale.edu/catalog/32582598.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 13, folder 631"])(circa 1915)[Keystone View Company, Meadville, PA; New York, NY; Chicago, IL; London, ENG "P215 - V22091. Cars Loaded with Cotton Bales on Levee Near Cotton Growing District, Texas." Stereograph, grey card]. https://collections.library.yale.edu/catalog/32582598.