Cite

Rocks used for tracking vessels along river, Chongqing, China, ca.1900-1920

MLA

Rocks Used for Tracking Vessels along River, Chongqing, China, Ca.1900-1920. 0AD. https://collections.library.yale.edu/catalog/16714560.

APA, 6th edition

Rocks used for tracking vessels along river, Chongqing, China, ca.1900-1920. (0 C.E.). [Photographs (AAT)]. https://collections.library.yale.edu/catalog/16714560.