MLA

Vertue, George, 1684-1756, artist. A circular brick-tower at Tottenham 16-f. diameter, about 40 f. high in all : in the fore-part or court-yard at Lord Colerane's house, which has been built time out of mind / [art original]. [between 1720 and 1756?]. https://collections.library.yale.edu/catalog/33202747.

APA, 6th edition

Vertue, George, 1684-1756, artist. ([between 1720 and 1756?])[A circular brick-tower at Tottenham 16-f. diameter, about 40 f. high in all : in the fore-part or court-yard at Lord Colerane's house, which has been built time out of mind / [art original]]. https://collections.library.yale.edu/catalog/33202747.