Cite

Young boy sticking out his tongue, Congo, ca. 1920-1940

MLA

Young Boy Sticking out His Tongue, Congo, Ca. 1920-1940. 1920. https://collections.library.yale.edu/catalog/11455881.

APA, 6th edition

Young boy sticking out his tongue, Congo, ca. 1920-1940. (1920). [Photographic postcards (AAT), photographs (AAT), portraits (AAT)]. https://collections.library.yale.edu/catalog/11455881.