MLA

Vertue, George, 1684-1756, artist. A brass term sold at Ld. Hallifax sale [art original] : made for one of the .... [between 1720 and 1756?]. https://collections.library.yale.edu/catalog/33202725.

APA, 6th edition

Vertue, George, 1684-1756, artist. ([between 1720 and 1756?])[A brass term sold at Ld. Hallifax sale [art original] : made for one of the ...]. https://collections.library.yale.edu/catalog/33202725.