Cite

Top of ancient observatory, Beijing, China, 1927

MLA

Top of Ancient Observatory, Beijing, China, 1927. 0AD. https://collections.library.yale.edu/catalog/16714553.

APA, 6th edition

Top of ancient observatory, Beijing, China, 1927. (0 C.E.). [Photographs (AAT)]. https://collections.library.yale.edu/catalog/16714553.