People operating a printing press, Congo, ca. 1920-1940
MLA
People Operating a Printing Press, Congo, Ca. 1920-1940. 1920. https://collections.library.yale.edu/catalog/11455632.
APA, 6th edition
People operating a printing press, Congo, ca. 1920-1940. (1920). [General views (AAT), photographic postcards (AAT), photographs (AAT)]. https://collections.library.yale.edu/catalog/11455632.