Cite

A group photograph showing the heads of four Chinese girls, ca. 1920-1940.

MLA

A Group Photograph Showing the Heads of Four Chinese Girls, Ca. 1920-1940. 1920. https://collections.library.yale.edu/catalog/11476825.

APA, 6th edition

A group photograph showing the heads of four Chinese girls, ca. 1920-1940. (1920). [Group portraits (AAT), photographic postcards (AAT), photographs (AAT)]. https://collections.library.yale.edu/catalog/11476825.