MLA

Woman Carrying a Child on Her Back Standing with Others near Tents, Canada, Ca. 1920-1940. 1920. https://collections.library.yale.edu/catalog/11477981.

APA, 6th edition

Woman carrying a child on her back standing with others near tents, Canada, ca. 1920-1940. (1920). [General views (AAT), photographic postcards (AAT), photographs (AAT)]. https://collections.library.yale.edu/catalog/11477981.