MLA

Williams, Jonathan, 1929-2008. Corbett, William. Box 27 | Album 27. circa 1978. https://collections.library.yale.edu/catalog/2108139.

APA, 6th edition

Williams, Jonathan, 1929-2008. (["Box 27 | Album 27"])(circa 1978)[Corbett, William]. https://collections.library.yale.edu/catalog/2108139.