Cite

Smallpox vaccinations, Chengdu, Sichuan, China, ca. 1942

MLA

Smallpox Vaccinations, Chengdu, Sichuan, China, Ca. 1942. 1940. https://collections.library.yale.edu/catalog/11427049.

APA, 6th edition

Smallpox vaccinations, Chengdu, Sichuan, China, ca. 1942. (1940). [General views (AAT), photographs (AAT)]. https://collections.library.yale.edu/catalog/11427049.