If you intend to join voluntarily before the military service bill comes into operation

Chicago citation style
If you intend to join voluntarily before the military service bill comes into operation. ca. 1914-1918. Retrieved from the Digital Public Library of America, http://digital.library.temple.edu/cdm/ref/collection/p16002coll9/id/2954. (Accessed December 18, 2018.)
APA citation style
(ca. 1914-1918) If you intend to join voluntarily before the military service bill comes into operation. Retrieved from the Digital Public Library of America, http://digital.library.temple.edu/cdm/ref/collection/p16002coll9/id/2954
MLA citation style
Retrieved from the Digital Public Library of America <http://digital.library.temple.edu/cdm/ref/collection/p16002coll9/id/2954>.
Note: These citations are programmatically generated and may be incomplete.