MLA

Simpson, Randolph Linsly, 1927-1992. Unknown photographer Soldiers Orphans Home (Band), Normal, Illinois. Band outdoors with instruments. Photographic postcard. Box 25. circa 1920. https://collections.library.yale.edu/catalog/16172739.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 25"])(circa 1920)[Unknown photographer Soldiers Orphans Home (Band), Normal, Illinois. Band outdoors with instruments. Photographic postcard]. https://collections.library.yale.edu/catalog/16172739.