MLA

Simpson, Randolph Linsly, 1927-1992. W.P. Kendall, Woodstock, VT Three quarter length portrait, young man one quarter left, face forward; seated with stripe on trousers. Carte de visite. Box 11, folder 339. circa 1868. https://collections.library.yale.edu/catalog/2003854.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 11, folder 339"])(circa 1868)[W.P. Kendall, Woodstock, VT Three quarter length portrait, young man one quarter left, face forward; seated with stripe on trousers. Carte de visite]. https://collections.library.yale.edu/catalog/2003854.