MLA

Simpson, Randolph Linsly, 1927-1992. Ober Brothers, Fernandina, FL Stamped recto, "Ober Brothers, Fernandina, Fla. New Series Florida Views." Stereograph, ivory card. Box 12, folder 543. circa 1879. https://collections.library.yale.edu/catalog/2111704.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 12, folder 543"])(circa 1879)[Ober Brothers, Fernandina, FL Stamped recto, "Ober Brothers, Fernandina, Fla. New Series Florida Views." Stereograph, ivory card]. https://collections.library.yale.edu/catalog/2111704.