Cite

Purple Mountain, Nanjing, Jiangsu, China, ca. 1900-1932

MLA

Purple Mountain, Nanjing, Jiangsu, China, Ca. 1900-1932. 1900. https://collections.library.yale.edu/catalog/11424198.

APA, 6th edition

Purple Mountain, Nanjing, Jiangsu, China, ca. 1900-1932. (1900). [Photographs (AAT), topographical views (AAT)]. https://collections.library.yale.edu/catalog/11424198.