Join the army air service. Be an American eagle!

Chicago citation style
Bull, Charles Livingston, 1874-1932. Join the army air service. Be an American eagle!. 1918. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/ft848v83s. (Accessed June 22, 2018.)
APA citation style
Bull, Charles Livingston, 1874-1932, (1918) Join the army air service. Be an American eagle!. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/ft848v83s
MLA citation style
Bull, Charles Livingston, 1874-1932. Retrieved from the Digital Public Library of America <http://ark.digitalcommonwealth.org/ark:/50959/ft848v83s>.
Note: These citations are programmatically generated and may be incomplete.