Cite

[Photograph of Oscar Willis, also known as Willio, in costume]

MLA

Gurney, J., and Son. [Photograph of Oscar Willis, Also Known as Willio, in Costume]. 0AD. https://collections.library.yale.edu/catalog/16198652.

APA, 6th edition

Gurney, J., & S. (0 C.E.). [Photograph of Oscar Willis, also known as Willio, in costume] [Albumen prints, Cartes-de-visite, Photographic prints, Studio portraits]. https://collections.library.yale.edu/catalog/16198652.