MLA

Simpson, Randolph Linsly, 1927-1992. Kuebler Photographic Art Studio, Philadelphia, PA Full length portrait of baby Clara, seated on fur. Cabinet photograph. Box 9, folder 256. circa 1885. https://collections.library.yale.edu/catalog/2002308.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 9, folder 256"])(circa 1885)[Kuebler Photographic Art Studio, Philadelphia, PA Full length portrait of baby Clara, seated on fur. Cabinet photograph]. https://collections.library.yale.edu/catalog/2002308.