Model 1916 German helmet

Chicago citation style
Model 1916 German helmet. 1916-1918. Retrieved from the Digital Public Library of America, http://cdm15138.contentdm.oclc.org/cdm/ref/collection/p15138coll29/id/2345. (Accessed October 19, 2019.)
APA citation style
(1916-1918) Model 1916 German helmet. Retrieved from the Digital Public Library of America, http://cdm15138.contentdm.oclc.org/cdm/ref/collection/p15138coll29/id/2345
MLA citation style
Retrieved from the Digital Public Library of America <http://cdm15138.contentdm.oclc.org/cdm/ref/collection/p15138coll29/id/2345>.
Note: These citations are programmatically generated and may be incomplete.