MLA

Missionaries Sisters with Patients Suffering from Sleeping Sickness, Ibembo, Congo, Ca. 1920-1940. 1920. https://collections.library.yale.edu/catalog/11454927.

APA, 6th edition

Missionaries sisters with patients suffering from sleeping sickness, Ibembo, Congo, ca. 1920-1940. (1920). [Group portraits (AAT), photographic postcards (AAT), photographs (AAT)]. https://collections.library.yale.edu/catalog/11454927.