MLA

Simpson, Randolph Linsly, 1927-1992. [Brett (barely legible under label pasted over), Boston (?, under label)], MA Full length portrait of Charley Frey; man in blackface, wig, checkered pants, standing beside elaborately carved chair. Cabinet photograph. Box 9, folder 277. circa 1895. https://collections.library.yale.edu/catalog/2002329.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 9, folder 277"])(circa 1895)[[Brett (barely legible under label pasted over), Boston (?, under label)], MA Full length portrait of Charley Frey; man in blackface, wig, checkered pants, standing beside elaborately carved chair. Cabinet photograph]. https://collections.library.yale.edu/catalog/2002329.