A man preparing to start the engine of a San Diego Air Service biplane as other men watch

Chicago citation style
Unknown. A man preparing to start the engine of a San Diego Air Service biplane as other men watch. 1930 1930. Retrieved from the Digital Public Library of America, http://ark.cdlib.org/ark:/13030/kt2j49p99q. (Accessed December 16, 2018.)
APA citation style
Unknown, (1930 1930) A man preparing to start the engine of a San Diego Air Service biplane as other men watch. Retrieved from the Digital Public Library of America, http://ark.cdlib.org/ark:/13030/kt2j49p99q
MLA citation style
Unknown. Retrieved from the Digital Public Library of America <http://ark.cdlib.org/ark:/13030/kt2j49p99q>.
Note: These citations are programmatically generated and may be incomplete.