MLA

Williams, Jonathan, 1929-2008. Sepulchral Artwork. Box 27 | Album 27. circa 1982. https://collections.library.yale.edu/catalog/2108110.

APA, 6th edition

Williams, Jonathan, 1929-2008. (["Box 27 | Album 27"])(circa 1982)[Sepulchral Artwork]. https://collections.library.yale.edu/catalog/2108110.