Cite

[A study of heads] [art original].

MLA

Gillray, James, 1756-1815, artist. [A study of heads] [art original].. [179-?]. https://collections.library.yale.edu/catalog/15960101.

APA, 6th edition

Gillray, James, 1756-1815, artist. ([179-?])[[A study of heads] [art original].]. https://collections.library.yale.edu/catalog/15960101.