Cite

[Unnumbered engraving depicting the god Mercury]

MLA

[Unnumbered Engraving Depicting the God Mercury]. 0AD. https://collections.library.yale.edu/catalog/2019817.

APA, 6th edition

[Unnumbered engraving depicting the god Mercury]. (0 C.E.). [Engravings, Illustrations, Prints (Visual works)]. https://collections.library.yale.edu/catalog/2019817.