Cite

Four inset images of waterfalls, Congo, ca. 1920-1940

MLA

Four Inset Images of Waterfalls, Congo, Ca. 1920-1940. 1920. https://collections.library.yale.edu/catalog/11455757.

APA, 6th edition

Four inset images of waterfalls, Congo, ca. 1920-1940. (1920). [General views (AAT), photographs (AAT)]. https://collections.library.yale.edu/catalog/11455757.