Cite

(trees in foreground, horse and tents in background)

MLA

Giard, Robert. (Trees in Foreground, Horse and Tents in Background). 0AD. https://collections.library.yale.edu/catalog/2033219.

APA, 6th edition

Giard, R. (0 C.E.). (trees in foreground, horse and tents in background). https://collections.library.yale.edu/catalog/2033219.