Helen Keller and Polly Thomson

Chicago citation style
Helen Keller and Polly Thomson. 1920-1962. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/q237j2654. (Accessed June 20, 2018.)
APA citation style
(1920-1962) Helen Keller and Polly Thomson. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/q237j2654
MLA citation style
Retrieved from the Digital Public Library of America <http://ark.digitalcommonwealth.org/ark:/50959/q237j2654>.
Note: These citations are programmatically generated and may be incomplete.