Cite

[Lady Charlotte Maria Waldegrave] [art original].

MLA

Humphry, Ozias, 1742-1810, artist. [Lady Charlotte Maria Waldegrave] [art original].. [ca. 1778]. https://collections.library.yale.edu/catalog/15960081.

APA, 6th edition

Humphry, Ozias, 1742-1810, artist. ([ca. 1778])[[Lady Charlotte Maria Waldegrave] [art original].]. https://collections.library.yale.edu/catalog/15960081.