MLA

Linnell, John, 1792-1882. 27. Unidentified Scene in Hell (Male Figure Reclining), from Canto 18 (Butlin 812.100). Box 7 (Oversize). 1831. https://collections.library.yale.edu/catalog/15533037.

APA, 6th edition

Linnell, John, 1792-1882. (["Box 7 (Oversize)"])(1831)[27. Unidentified Scene in Hell (Male Figure Reclining), from Canto 18 (Butlin 812.100)]. https://collections.library.yale.edu/catalog/15533037.