MLA

Simpson, Randolph Linsly, 1927-1992. S.A. McIntire, Sandy Lake, PA Full length portrait, two young black boys, barefoot; one sits on rail fence in grimace while the other kneeling, removes small object from his foot. Cabinet photograph. Box 9, folder 186. circa 1885. https://collections.library.yale.edu/catalog/2002238.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 9, folder 186"])(circa 1885)[S.A. McIntire, Sandy Lake, PA Full length portrait, two young black boys, barefoot; one sits on rail fence in grimace while the other kneeling, removes small object from his foot. Cabinet photograph]. https://collections.library.yale.edu/catalog/2002238.