Cite

[Portrait of Galfridus Mann] [art original].

MLA

Astley, John, 1724-1787, artist. [Portrait of Galfridus Mann] [art original].. [ca. 1752]. https://collections.library.yale.edu/catalog/16721005.

APA, 6th edition

Astley, John, 1724-1787, artist. ([ca. 1752])[[Portrait of Galfridus Mann] [art original].]. https://collections.library.yale.edu/catalog/16721005.