MLA

Simpson, Randolph Linsly, 1927-1992. B.W. Kilburn, Littleton, NH Copyright 1879 "456. Picking Cotton, Fla." Stereograph, ivory card. Box 13, folder 646. 1879. https://collections.library.yale.edu/catalog/32582619.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 13, folder 646"])(1879)[B.W. Kilburn, Littleton, NH Copyright 1879 "456. Picking Cotton, Fla." Stereograph, ivory card]. https://collections.library.yale.edu/catalog/32582619.