MLA

Simpson, Randolph Linsly, 1927-1992. Studio unknown Full length exterior triple portrait, three young boys, the one center seated, the others standing, all before a rustic building outdoors. Cabinet photograph. Box 9, folder 216. circa 1895. https://collections.library.yale.edu/catalog/2002268.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 9, folder 216"])(circa 1895)[Studio unknown Full length exterior triple portrait, three young boys, the one center seated, the others standing, all before a rustic building outdoors. Cabinet photograph]. https://collections.library.yale.edu/catalog/2002268.