Cite

[Saint John the Evangelist holding cup with serpent] [graphic].

MLA

[Saint John the Evangelist Holding Cup with Serpent] [Graphic]. publisher not identified, 0AD. https://collections.library.yale.edu/catalog/17338450.

APA, 6th edition

[Saint John the Evangelist holding cup with serpent] [graphic]. (0 C.E.). [Engravings]. publisher not identified. https://collections.library.yale.edu/catalog/17338450.