No. 2211 Pencil sketch by Lady Alma-Tadema.
MLA
Eliot, George, 1819-1880. No. 2211 Pencil sketch by Lady Alma-Tadema.. Box 61. n.d.. https://collections.library.yale.edu/catalog/2012895.
APA, 6th edition
Eliot, George, 1819-1880. (["Box 61"])(n.d.)[No. 2211 Pencil sketch by Lady Alma-Tadema.]. https://collections.library.yale.edu/catalog/2012895.