Cite

Five girls on a hillside gathered around a spring, Ethiopia, ca. 1900-1930

MLA

Five Girls on a Hillside Gathered around a Spring, Ethiopia, Ca. 1900-1930. 1900. https://collections.library.yale.edu/catalog/11437184.

APA, 6th edition

Five girls on a hillside gathered around a spring, Ethiopia, ca. 1900-1930. (1900). [Group portraits (AAT), photographic postcards (AAT), photographs (AAT)]. https://collections.library.yale.edu/catalog/11437184.