MLA

Thornhill, James, Sir, 1675 or 1676-1734, artist. [Section drawing for St. Martin-in-the-Field project] [art original].. [between 1720 and 1721]. https://collections.library.yale.edu/catalog/11134220.

APA, 6th edition

Thornhill, James, Sir, 1675 or 1676-1734, artist. ([between 1720 and 1721])[[Section drawing for St. Martin-in-the-Field project] [art original].]. https://collections.library.yale.edu/catalog/11134220.