Cite

Two men on horseback with spears, Cameroon, ca. 1920-1930

MLA

Two Men on Horseback with Spears, Cameroon, Ca. 1920-1930. 1920. https://collections.library.yale.edu/catalog/11432822.

APA, 6th edition

Two men on horseback with spears, Cameroon, ca. 1920-1930. (1920). [Group portraits (AAT), photographic postcards (AAT), photographs (AAT)]. https://collections.library.yale.edu/catalog/11432822.