MLA

Carter, John, 1748-1817, artist. (Slight sketch of the) general ground plott of the gothic mansion, and the grounds adjacent, at Strawberry-Hill [art original].. [between 1790 and 1797]. https://collections.library.yale.edu/catalog/16192926.

APA, 6th edition

Carter, John, 1748-1817, artist. ([between 1790 and 1797])[(Slight sketch of the) general ground plott of the gothic mansion, and the grounds adjacent, at Strawberry-Hill [art original].]. https://collections.library.yale.edu/catalog/16192926.