Cite

An operation in progress, Chengdu, Sichuan, China, ca. 1944

MLA

An Operation in Progress, Chengdu, Sichuan, China, Ca. 1944. 1940. https://collections.library.yale.edu/catalog/11426967.

APA, 6th edition

An operation in progress, Chengdu, Sichuan, China, ca. 1944. (1940). [General views (AAT), photographs (AAT)]. https://collections.library.yale.edu/catalog/11426967.