"Back our girls over there. Y.W.C.A. United War Work Campaign."

Chicago citation style
U.S. Food Administration. Educational Division. Advertising Section. (3/1918 - 1/1919). "Back our girls over there. Y.W.C.A. United War Work Campaign.". 1917-01-01/1919-12-31. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/512611. (Accessed December 14, 2018.)
APA citation style
U.S. Food Administration. Educational Division. Advertising Section. (3/1918 - 1/1919), (1917-01-01/1919-12-31) "Back our girls over there. Y.W.C.A. United War Work Campaign.". Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/512611
MLA citation style
U.S. Food Administration. Educational Division. Advertising Section. (3/1918 - 1/1919). Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/512611>.
Note: These citations are programmatically generated and may be incomplete.