MLA

Simpson, Randolph Linsly, 1927-1992. J. H. Kent, Photographer, 24 State Street, Rochester, N.Y. Cameo portrait of Frederick Douglass, looking right. Studio photograph. 9-1/4 x 6-1/2. Box 10, folder 310. circa 1892. https://collections.library.yale.edu/catalog/10733713.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 10, folder 310"])(circa 1892)[J. H. Kent, Photographer, 24 State Street, Rochester, N.Y. Cameo portrait of Frederick Douglass, looking right. Studio photograph. 9-1/4 x 6-1/2]. https://collections.library.yale.edu/catalog/10733713.