Cite

Cavalry troops parading along Beijing's Old City Wall

MLA

Cavalry Troops Parading along Beijing's Old City Wall. 0AD. https://collections.library.yale.edu/catalog/17230863.

APA, 6th edition

Cavalry troops parading along Beijing's Old City Wall. (0 C.E.). [Photographs (AAT)]. https://collections.library.yale.edu/catalog/17230863.