[Walpole shield] [art original].
MLA
[Walpole Shield] [Art Original]. 0AD. https://collections.library.yale.edu/catalog/11134221.
APA, 6th edition
[Walpole shield] [art original]. (0 C.E.). [Watercolors British 18th century]. https://collections.library.yale.edu/catalog/11134221.