Cite

(two men, one with mustache)

MLA

Giard, Robert. (Two Men, One with Mustache). 0AD. https://collections.library.yale.edu/catalog/2033196.

APA, 6th edition

Giard, R. (0 C.E.). (two men, one with mustache). https://collections.library.yale.edu/catalog/2033196.