MLA

Simpson, Randolph Linsly, 1927-1992. R.R. Morris, Greenwood, SC, Bales of cotton at freight warehouse (in Series I). Box 48, folder 1196. circa 1867. https://collections.library.yale.edu/catalog/10257549.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 48, folder 1196"])(circa 1867)[R.R. Morris, Greenwood, SC, Bales of cotton at freight warehouse (in Series I)]. https://collections.library.yale.edu/catalog/10257549.