Cite

[Portrait of King Richard III and his Queen] [art original].

MLA

Vertue, George, 1684-1756, artist. [Portrait of King Richard III and his Queen] [art original].. [not after 1768]. https://collections.library.yale.edu/catalog/15960097.

APA, 6th edition

Vertue, George, 1684-1756, artist. ([not after 1768])[[Portrait of King Richard III and his Queen] [art original].]. https://collections.library.yale.edu/catalog/15960097.