MLA

Simpson, Randolph Linsly, 1927-1992. George Barker, Niagara Falls, NY "The Lighting Express-Savannah Georgia." Stereograph, ivory card. Box 12, folder 613. 1886. https://collections.library.yale.edu/catalog/2111717.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 12, folder 613"])(1886)[George Barker, Niagara Falls, NY "The Lighting Express-Savannah Georgia." Stereograph, ivory card]. https://collections.library.yale.edu/catalog/2111717.