Cite

[Sketch of a design in a cross shape] [art original].

MLA

[Sketch of a Design in a Cross Shape] [Art Original]. 0AD. https://collections.library.yale.edu/catalog/11001147.

APA, 6th edition

[Sketch of a design in a cross shape] [art original]. (0 C.E.). [Graphite drawings British 18th century, Annotations (Provenance) 18th century]. https://collections.library.yale.edu/catalog/11001147.