Cite

Eleanora of Toledo wife of Cosmo the Great, first great Duke of Tuscany [art original].

MLA

Eleanora of Toledo Wife of Cosmo the Great, First Great Duke of Tuscany [Art Original]. 0AD. https://collections.library.yale.edu/catalog/11001133.

APA, 6th edition

Eleanora of Toledo wife of Cosmo the Great, first great Duke of Tuscany [art original]. (0 C.E.). [Portraits, Portrait drawings, Watercolors 18th century]. https://collections.library.yale.edu/catalog/11001133.