Cite

[Horace Walpole in his library] [art original]

MLA

Harding, G. P. (George Perfect), 1780-1853. [Horace Walpole in his library] [art original]. [between 1802 and 1853?]. https://collections.library.yale.edu/catalog/15808818.

APA, 6th edition

Harding, G. P. (George Perfect), 1780-1853. ([between 1802 and 1853?])[[Horace Walpole in his library] [art original]]. https://collections.library.yale.edu/catalog/15808818.