MLA

Williams, Jonathan, 1929-2008. Basil Bunting. A080401. circa 1978-1995. https://collections.library.yale.edu/catalog/2045376.

APA, 6th edition

Williams, Jonathan, 1929-2008. (["A080401"])(circa 1978-1995)[Basil Bunting]. https://collections.library.yale.edu/catalog/2045376.