MLA

Women Showing Various Stages of Thread, Pang Chuang, Shandong, China, Ca. 1890. 1890. https://collections.library.yale.edu/catalog/11424772.

APA, 6th edition

Women showing various stages of thread, Pang Chuang, Shandong, China, ca. 1890. (1890). [Group portraits (AAT), photographs (AAT)]. https://collections.library.yale.edu/catalog/11424772.