MLA

[Sophia Matilda, Princess of Gloucester] [Art Original]. 0AD. https://collections.library.yale.edu/catalog/15815187.

APA, 6th edition

[Sophia Matilda, Princess of Gloucester] [art original]. (0 C.E.). [Enamels (visual works), Verre églomisé, Paintings British 18th century, Portraits British 18th century]. https://collections.library.yale.edu/catalog/15815187.